I'm sure this is posted in a FAQ somewhere on this site, but as I hadn't found it yet, I'm sure others could use the information, too.
RIM has an e-mail notification list which will alert you when new software is released.
To subscribe, send a blank email to:
![[email address]](http://www.blackberryforums.com/?emailimage=52cc159dfcaaa815364c0093c8faa456)