Adobe Flash 10.1 with Hardware Acceleration for HD Videos is almost finished, Adobe has just launched it's 
Release Candidate
for Windows, Macintosh and Linux Platforms.
Flash 10.1 includes not only Acceleration for H264 Videos but also support for AMD's UVD2 and NVIDIA's VP2 Engine to offload processing to the GPU.
You can grab the RC here and you can also read the Release Notes here.
