Update from RIM: We know that there were some users who weren't able to download the application from the email we sent out on January 14th. We have fixed the problem and invite you to join the BlackBerry Messenger 7.0.1 beta program! Head on over to BlackBerry Beta Zone and download the latest version today!
BBM 7.0.1 has landed in the BlackBerry Beta Zone bringing support for OS 5.0 devices. The update includes some overall fixes and tweaks and now lets users running OS 5.0 get in on the action as well. It shouldn't be too long before this one rolls out to the public if things go well.
If you're a Beta Zone member you can login now and you should see the available update.