Guess it can't hurt. I can do a backup of the 2G (hopefully; when I tried to put a song on it yesterday, it told me that all songs would be erased since I use a new laptop now, and I used to sync everything on my OLD laptop, which died.) I have the 3G setup pretty much the way I want, so hopefully it'll work.
Well, the good news is that doing the backup of the 2G and then restoring the backup to the 3G *did* copy all my contacts, call logs, texts, and mail.
The BAD news is that it didn't copy my songs; my email passwords, and it reset the home screen (which I had setup using Categories.)
So, no huge deal, I guess the biggest thing is for me to go through my music library and re-add the songs.
edit: Forgot to mention, now I need to go find a decent case so my 3G doesn't get all scratched up (especially the back) like my 2G did. Wonder if there's any place I can send my 2G to so I can get it "refreshed" and cleaned up, removing the scratches and whatnot...