I can't say from personal experience - yet - but MM has been doing this a long time. Also, I see that format on a lot of news sites and blogs and have to figure there's a reason for it. It is OK with the TOS. That post went popular on Digg and that question was brought up in the comments. And I think the comments on my site too. Anyway, it's Google's code - they control it. So how would it not be ok? Google does not care what color your ads are or if they change from page to page or minute by minute. I'm glad a lot of people are finding value in that post. Those tips have already helped me out a great deal and I look forward to working with them more to see how far I can take it. I'm sure a lot of that info is old news to many of the folks here at DP but for newbie's or at least newbies at Adsense like me it really cleared things up.