I have been so consumed with the Google IPO, SEMPO Scandals and general forum coverage that I missed the reported Yahoo Update. A thread at WebmasterWorld was created August 13th in reaction to the "significant updates in serps" over at Yahoo! Search. Others have coincidentally reported major MSN Search the same day. MSN is currently powered by Inktomi, which is owned by Yahoo - see any relationship there?
An update over at Yahoo and MSN at the same day. Gets one thinking...