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iwannano1 - 4:56 am on Dec 12, 2007 (gmt 0)
See sample here [img20.imageshack.us] This is enabled on all ad format, 350x250, 200x200, 160, 120, 480 etc. Looks quite good.
Google is experimenting with new interesting ajax based ad format. I noticed it enabled on few sites. If you click on scroll bar it will scroll and add new ad format using ajax call.