I've got the Blackberry Pearl, kinda dated but I hate to switch to a new phone it does everything I need it to and then some. I'm not sure on the apps but a great Blackberry users site is www.crackberry.com check it out and see if ya don't find something.
I actually looked at the Tour about 8 months ago when I considered upgrading but I had a hard time texting on it, buttons are kinda small. I have heard alot of good things about it though.
The wife and I have the Blackberry Storms - it's the touch pad version and we like them alot, They took a few days to get accustomed to but they have the big keys which I need due to my fingers size - we looked at the other versions and like Brian stated - the keys were just too small, for me anyways. Ours are through Verizon - just get one of the young whipersnapers who works at the store to help you with the apps - there's all kinds of cool stuff out there for the Blackberry's.