Displaying Information in 3D View Window 2.5

I would like to display information in the 3D View window in Blender 2.5 Alpha2. I was able to do this with 2.4x via a draw handler script and Open GL commands. How can do this with the new and improved python API?

I think you should find some useful info in script introduced in this thread:
http://blenderartists.org/forum/showthread.php?t=181703.