You could also try WireTap from Ambrosia, it only does AIFF but it grabs sound from any source as it plays..streams, games DVD etc.

[url]http://www.ambrosiasw.com[/url]

Glad WireTap got mentioned here; I am trying it right now and am successfully recording a speech played back by RealOne [free] player. I can't save the file in Real [I don't know whether the free player even allows saving, or whether this particular file isn't save-enabled], but I'm getting fine AIFF recordings of it. One problem that has nothing to do with WireTap: The Real player keeps stopping, every 15 minutes or so, forcing me to find the place in this speech where we left off recording, then start a new WireTap recording. So perhaps we can't count on unattended recording of some streaming audio ... nevertheless, WireTap is cool, and your mentions of it on this site are much appreciated here.

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osxpounder