Whatever is decided might I suggest two things:
1) Communicate with Tapatalk developers to PULL your site from their listing.. it still shows it's available and was one of the reasons I WAS going to purchase it.. thought I was doing something wrong when it wouldn't log in. (Your the 2nd site I use that is still showing YET has it disabled).
2) Custom apps are fine, but honestly I'd probably never use it myself if I have to end up installing a custom app for each site I visit. Think about it.. that's why RSS readers are so popular rather than just bookmarking every site you read.
If it's cross site, such as for all 'vBulletin' forums, that's one thing but if it's Phandroid only, you might want to ask your users if they'd bother using it before you waste the time.