This is the last 3 series release. It is mostly application-specific updates, as outlined in the release notes. Links are available here....
http://www.techimo.com/newsapp/index.pl?photo=9293
The big deal is the release of Multimedia Center 8.8 with support for streaming realtime video across a LAN to other systems equipped with a Radeon video card.
As to other updates, 3.10 implements advanced shading extensions for OpenGL, though at this time, you will have little need for this technology unless you are developing OpenGL applications.
Robert Richmond