RIM has decided to re-brand their userbase site MyBlackBerry under the new name BlackBerry Communities. I'm guessing they are trying to create a more social feel to the site to promote more user interaction. Also, the site has gotten a complete refresh which looks pretty good. Here is what the email says that was sent out by RIM to all MyBlackBerry registered users:
You'll be able to access our new Communities page at: http://us.blackberry.com/communities.
From the BlackBerry Communities page, you'll now be able to scan at a glance all the activity happening in real-time in all our communities. And because we value the opportunity to connect with our customers online, you'll also be able to quickly join any BlackBerry community conversation already in progress on Facebook®, Twitter®, YouTube®, our Support forums and our blogs, as well as see the top trending and newest free and paid BlackBerry Apps!
The BlackBerry Team at Research In Motion Limited