According to a solid BGR contact, BlackBerry OS 6.0 is in the works.  Additionally, BlackBerry OS 5.2 is going to be released this year.

We’ve got so many questions…  The biggest being will OS 6.0 be out this year as well and is 5.2 just a bridge to allow users to upgrade to 6.0?

We know that a WebKit BlackBerry Browser is coming.  New CDMA BlackBerry devices already support 3D graphics.  Will OS 5.2 address memory allocation?  Will RIM make it easier on developers by releasing development tools on par with those available for WebOS, Android, and the iPhone.  Will 5.2 be the last platform for older devices?  Will 6.0 only work on new devices?

The list of questions is almost endless…