IM+ Messenger is an app supports AIM, ICQ, MSN, Yahoo, Gtalk, Jabber all in one user interface. You don't wanna miss it.Any other must have? Really depends on what your BB is used for. Work or Lifestyle? Handango.com has some solutions on them.Congratulations on having new device. Mine is BIS 7290v unlocked use in China, with improved service book installed it even is able to send & receive MMS that default 72 series can not. Bet you'll have more fun with your powerful new BB.
How do you like Sprint and where are you cccablecompany?
I am South of Boston and I almost jumped ship to a 6700 WM5 but the service was so bad, worse than Nextel, so I stuck with my 7520. Would like to go to the 8700 series but if I have no service it is not worth it.
JiveTalk is by far the best IM application at the moment. I've used Yak On and while it was good at the time, I quickly uninstalled it after the release of JiveTalk. I will definitely be purchasing JiveTalk once it goes public after having beta testing it since it's initial release.