Nimbuzz, a popular multi-client instant messaging application, has just announced a native app for BlackBerry. The usual suspects like AIM, ICQ, Google Talk, and Windows Live Messenger are present, but the addtions of Skype, MySpace, and Facebook chat make Nimbuzz a serious contender. Over the summer, they released an Android version, and has been on the iPhone, Windows Mobile, and Symbian for awhile, so there’s a lot of experience going behind the BlackBerry app. I presume “native” means that the app uses proper BlackBerry APIs rather than just being a run-of-the-mill Java app that can go anywhere, but it’s still a bit vague. You can download Nimbuzz for any device with OS 4.6 and up from the BlackBerry App World for free.