What app to record screen and audio activity?

[steffi]

So, during the day I want to be able to record what's happening on my screen including both video and audio. I want to follow a realtime webcast when I'm away from my computer but this webcast isn't played thru the browser.

 

[iheartzombie]

just get Snow Leopard since Quicktime X will do this now

i think this does it as well, but i've never used it or researched it much:

Screen Flow