Danke fur das r00t 
Seriously, the guide was very helpful. I used HDev method for boot unlocker, decided not to worry about the water mark right now. I have a few basic questions, and I did read some of the similar type posts, but they were definitely older.
1.) Just to reiterate: no OTA updates, and no software updates? PRL and profile are ok?
2.) I have a 4GB SD card, but just ordered a 16 GB card. I've kind of halted before I downloaded too many apps or put too many other things on my phone/card. Is installing a new SD card going to mess anything up with my newly rooted phone? I'm using the MikG 3 ROM, and everything is stable. I just wanted to know if the SD card is like tied to the OS where if I simply pop it out, and pop in the new one, it's going to fart out on me.
3.) With uhm, legitimate apps, are they safe to update through the Market? Can I always update standard, basic "ok" apps even if my phone is rooted?
4.) Is there anything I should absolutely not do? I don't plan to start modding or deleting a ton of files or anything crazy. I just wanted to root to get a custom ROM and to run a few other apps.
Thanks guys, what a nice community of knowledgeable fellow nerds. I appreciate it!

Seriously, the guide was very helpful. I used HDev method for boot unlocker, decided not to worry about the water mark right now. I have a few basic questions, and I did read some of the similar type posts, but they were definitely older.
1.) Just to reiterate: no OTA updates, and no software updates? PRL and profile are ok?
2.) I have a 4GB SD card, but just ordered a 16 GB card. I've kind of halted before I downloaded too many apps or put too many other things on my phone/card. Is installing a new SD card going to mess anything up with my newly rooted phone? I'm using the MikG 3 ROM, and everything is stable. I just wanted to know if the SD card is like tied to the OS where if I simply pop it out, and pop in the new one, it's going to fart out on me.
3.) With uhm, legitimate apps, are they safe to update through the Market? Can I always update standard, basic "ok" apps even if my phone is rooted?
4.) Is there anything I should absolutely not do? I don't plan to start modding or deleting a ton of files or anything crazy. I just wanted to root to get a custom ROM and to run a few other apps.
Thanks guys, what a nice community of knowledgeable fellow nerds. I appreciate it!