The latest CVS snapshot can be grabbed from:
http://www.libsdl.org/cvs.html
Todays code features a greatly improved DGA driver:
- It’s now thread-safe
- Locking surfaces correctly waits for blit operations to complete
- Freeing hardware surfaces after changing video modes doesn’t crash
Yes, I’m working on Kohan DGA support, and it’s working really well. 
See ya!
-Sam Lantinga, Lead Programmer, Loki Software, Inc.