mhansen - 5:22 pm on Jul 19, 2011 (gmt 0)
I would even think beyond the floating sidebar...ads could even be popping up in true ajax style, with every page scroll...
I would have to concur with this line of thought or some other way to fit in the lower bidders. After all, if they only show one sidebar ad unit, there will be no page-2 bidders, etc. Aka... One static group of advertisers per query.
Of course, that would drive revenue up since the highest bidders are always in the first block of ads, right?