Last night I was able to successfully root my EVO 3D using Revolutionary, but it wasn't easy...took nearly 4 hours, and I would consider myself a power user (coming from a fully rooted EVO 4G with many custom ROMs). Here was my experience...not for the faint of heart, but it will work if you persevere!
1. Running the Revolutionary application was the easiest part of the whole process. It's basically a batch script that will take your phone through several boot iterations, the final of which will result in S-OFF (but NOT full root...there's still another step after that, more about that later). There is a step that requires you to provide the HBOOT version which kind of stumped me at first, but there is help on the thread for this. Running Revolutionary was relatively painless, and should be for most, except for...
2. The last step of the Revolutionary script is supposed to flash a recovery image (ClockworkMod) to your phone. This is required in order for you to acquire full root and do anything remotely useful with the phone. Unfortunately, this step seems to be failing on most (it did with mine), and the instructions and process for flashing a custom recovery image are tricky at best. Try as I might, I couldn't get the ClockworkMod image I downloaded into the proper file format (ZIP) and naming convention...and yes, I know what I'm doing with file formats and names! I had better luck with the TWRP recovery image, as the download of this image was already in the correct format and just needed to be renamed. The TWRP recovery seems to be working fine, so no reason not to stick with it so far.
3. Next hurdle: once you get a recovery image loaded, you must use it to flash the superuser ZIP file to gain su rights to the phone. This in theory is easy, but is made harder by the fact that there are apparently many versions of this file and not all of them will work. The one posted on the instructions page (the"goo inside me" link, I should've known better) was a dead link. I found more than a few by doing a google search of the superuser/su-2.3.6.3-efgh-signed.zip file name. The first couple resulted in an error, but eventually I got one that worked. Took a while, though.
4. Next, rooting with Revolutionary will probably make you lose your ability to make and receive calls, as well as data, which can freak you out if you're not ready for it. There are a number of posts about this, but save yourself the trouble and just call Sprint tech support. They were able to get me cleared up (essentially it requires a phone reactivation), but it took a few tries.
All in all, I would say that rooting the EVO 3D was harder than rooting the EVO, especially given that I was much less experienced with the EVO. The developers have done a great job with Revolutionary, but I would say that it has a ways to go before the rooting process is hands-off (like it was with the EVO. The good news is that I've been using the phone for a day or so and not only is it completely normal, overall performance is better, and the good old root apps I was used to (WiFi Tether, Titanium, SetCPU, SystemPanel) all work fine.
Summary: If you've got some experience with rooting/flashing and you have a few hours, you should be fine...if you're new at this and not hell bent on having root, best to wait until the process is fully baked.
1. Running the Revolutionary application was the easiest part of the whole process. It's basically a batch script that will take your phone through several boot iterations, the final of which will result in S-OFF (but NOT full root...there's still another step after that, more about that later). There is a step that requires you to provide the HBOOT version which kind of stumped me at first, but there is help on the thread for this. Running Revolutionary was relatively painless, and should be for most, except for...
2. The last step of the Revolutionary script is supposed to flash a recovery image (ClockworkMod) to your phone. This is required in order for you to acquire full root and do anything remotely useful with the phone. Unfortunately, this step seems to be failing on most (it did with mine), and the instructions and process for flashing a custom recovery image are tricky at best. Try as I might, I couldn't get the ClockworkMod image I downloaded into the proper file format (ZIP) and naming convention...and yes, I know what I'm doing with file formats and names! I had better luck with the TWRP recovery image, as the download of this image was already in the correct format and just needed to be renamed. The TWRP recovery seems to be working fine, so no reason not to stick with it so far.
3. Next hurdle: once you get a recovery image loaded, you must use it to flash the superuser ZIP file to gain su rights to the phone. This in theory is easy, but is made harder by the fact that there are apparently many versions of this file and not all of them will work. The one posted on the instructions page (the"goo inside me" link, I should've known better) was a dead link. I found more than a few by doing a google search of the superuser/su-2.3.6.3-efgh-signed.zip file name. The first couple resulted in an error, but eventually I got one that worked. Took a while, though.
4. Next, rooting with Revolutionary will probably make you lose your ability to make and receive calls, as well as data, which can freak you out if you're not ready for it. There are a number of posts about this, but save yourself the trouble and just call Sprint tech support. They were able to get me cleared up (essentially it requires a phone reactivation), but it took a few tries.
All in all, I would say that rooting the EVO 3D was harder than rooting the EVO, especially given that I was much less experienced with the EVO. The developers have done a great job with Revolutionary, but I would say that it has a ways to go before the rooting process is hands-off (like it was with the EVO. The good news is that I've been using the phone for a day or so and not only is it completely normal, overall performance is better, and the good old root apps I was used to (WiFi Tether, Titanium, SetCPU, SystemPanel) all work fine.
Summary: If you've got some experience with rooting/flashing and you have a few hours, you should be fine...if you're new at this and not hell bent on having root, best to wait until the process is fully baked.

