http://www.macnn.com/articles/10/10/19/converts.calls.to.popular.video.formats/
TalkAide for Skype records video, audio calls
updated 09:20 pm EDT, Tue October 19, 2010
Converts calls to popular video formats
Russian developer Intelus, maker of MacVide, has debuted a new application specifically for recording audio and video calls in Skype, TalkAide. The program can be set up to automatically launch and record either individual or group conference calls, and supports QuickTime, MPEGs 1 and 4, Flash formats and VOB for easy DVD burning among others.
The program supports recording audio in MP3, WMA or AAC files, and outputs video suitable for PSP and AVI for Windows in addition to the usual Mac and Flash formats. A free trial version is available. The program retails for $40.
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CallRecorder
I've been doing this for years: http://ecamm.com/mac/callrecorder/