WireTap is a free application for Mac OSX that allows you to record and save any audio that plays through your speakers -- streaming audio, iChatAV sessions, game sound f/x, iTunes, DVD player, Quicktime, RealPlayer, whatever. You never know when this might come in handy.
Now, if only SnapzProX (made by the same company) were as good at saving streaming video. Unfortunately it still has too much lag -- or maybe its my computer. Anyone out there had success with this?