Read all about the cool new features…
http://www.blender.org/development/release-logs/blender-246/
2.5 is going to be a HUGE update though, with a totally customisable workflow, and the ability to modify / skin it to create customised tools.
For any 3D artists wanting to try it out and make a quick game in it ( no coding involved ), also check out this tutorial…
http://wiki.blender.org/index.php/BSoD/Introduction_to_the_Game_Engine
From an open-source aspect, we’re keeping an eye on 2.5 developments, from a point of view of changing our entire internal workflow – as well as moving to Google Apps for all documents / project development tasks etc.
I don’t think we’re ready to switch to Linux any time soon though.
Mal