I’m not a BlackBerry user, but if you want to use one with a Mac, check out this comment by Devin from my MobileAppsToday blog:
Check out the Missing Sync for BlackBerry 2.0 beta preview. This has numerous fixes and added features like syncing itunes playlist, proximity sync, and bluetooth connectivity.
Originally posted as a comment by devin on mediabistro.com: MobileAppsToday using Disqus.