I seem to recall a thread about how Adsense "burped" last Friday and showed a TON of PSA ads ... but I can't seem to find it - was this posted here in DP and/or did anyone else see this also?
Yes, Adsense reportedly burped last Friday, showed a ton of PSA ads for a lot of people which then turned into a wildly varying CTRs and eCPMs. That thread was at WMW.
I don't think there is one but the reports of numerous other webmasters should suffice. Just go to WMW and check it out on their Adsense board. It's now being referred to as 'Black Friday'. I'd post a link but I'm not sure that's ethical.