topics in Activision about Playstation 3

I Am wondering wether to get Rock Band or Guitar hero for my PS3 but i want to be able to use one guitar for both games. Is this Possible?

Will the new AirSet shared WebComputer release fix the problem of accumulating too many tabs on the tab menu as users switch between WebComputers and application?

I keep getting booted for "punk buster communication heartbeats" and "handshake" sometimes as well for Call of Duty 4 on my PC. I have no idea what that is. So I reinstalled the game and it still does the same thing. What do I do?