It depends upon what headset you have. Most bluetooth headsets are compatible with PS3, but old ones may not have as good sound quality. Also, most USB headsets will work as well.
Most any game that has online-multiplayer is headset compatible. (It should be stated on the back of the game box)
I really like the Playstation Stereo Headset
As long as it's a disk for PlayStation 3, it should be compatible
The Sony Playstation Stereo headset for $80 (Amazon) is designed to work with the PS3 and is not a bad choice among the available products
All of them.
Yes
No. PlayStation 3 games are not backwards-compatible with the PlayStation 2.
yes
Yes, They have a bluetooth headset.
No you cannot get Skate 3 for Playstation 2. Only compatible with Playstation 3 and Xbox 360
You can not play PlayStation 3 games on a PlayStation 1, but you can play PlayStation 1 games on a PlayStation 3. All of the PlayStation consoles are backwards compatible.
Most blue tooth headsets able to be paired and work with the Playstation 3 console.