Facebook shares drop at market's open trades $35.52

Does anyone know how Facebook's market cap compares to its cashflow? Or have any idea about the prospects for their ad revenue? (I know HN has had articles bashing DB ads of late, but is this the whole truth?)

It will be interesting to see whether the dollars from panicking retail investors who were bamboozled exceeds the greenshoe.

I guess the MS green shoe ran dry.