Yahoo AntiSpy picked up MateWatcher on my computer last night. Spybot missed it on a scan immediately prior. Perhaps it is a new signature? BTW- YAS takes over 10 minutes to remove it. I stopped the scan too early on a couple of occasions.
My suspicions arose when sending email through Outlook. When sending one message Outlook would notify me of sending 2 or more. I suspect this was MateWatcher sending out info.
I was also up to date with SpywareBlaster, Lavasoft Adaware Personal SE and Windows Defender. None caught it.