Upgrade to Leopard
I upgraded my IMac, really just my fancy IPod doc, to Leopard and it sure was easy. There is 300 new features and I could really care less about most of them. The one thing that got me all excited was the new terminal. I used to use ITerm because the OSX terminal was a pile but they really fixed it up. Maybe some day they will catch up to my most beloved terminal Konsole.