JenSense

Google AdSense will be hosting another Optimization webinar on Tuesday August 2, 2005 at 5pm PST.
An hour-long seminar on AdSense implementation techniques that can boost revenue. The program will cover ways publishers can use ad formats, colors, and positioning – as well as new AdSense features – to improve the performance of AdSense. [...]

For all of those people thinking how clever the third-party javascript AdSense trick was, better think again before you try it out for yourself. Both publisher accounts associated with the tellafriends.com domain name appear to be suspended.
I suspect the publisher could have gotten away with it for longer if he/she hadn’t used the rectangle, and [...]