As far as having an actual compatibility list that's out for lunch at the present time. The dual boot of Vista with XP found that several older games and AVG as well as Ad-Aware, Spyware Terminator, and other older programs including Roxio's Easy Media Creator 8 went right on.
Some newer games like Metal of Honor: Allied Assault won't even install. And the software for the MCE model tv tuner card needs a new software. It's trial and error time again like origianlly seen with XP.