Hi Dadams,
I misunderstood your question. After a fair amount of research I ordered this card today from Newegg.
It plugs into one PCIe 16 slot.
However it has a modified Zalman VF 1000 aftermarket heatsink fan module which doubles the cards depth. So it is effectively 2 slots wide. It means if you had 2 PCIe16 slots close together and wanted to buy 2 of these cards and run SLI you would probably have a problem. It also means you need to closely check your motherboard or pictures of your motherboard to see if the extra depth will cause problems.
Do some google searchs for MSI Zilent.
The board I ordered today (GA P35 DS3L) only has one PCIe16 slot. The card's fan, shroud and heat pipes extend from the slot over the motherboard. I was worried it might rub up against the South Bridge, but some people in this forum assured me it would fit. It looks like it might be tight. I just hope it's heat doesn't affect the south bridge. I'll be using an Antec 900 case though which is supposed to run really cool.
I'll be posting results once I receive it and have it running.
The number of reviews on newegg have tripled in the past two days. Everyone says its the best 8800GT because the fan provides an aftermarket cooling solution as stock. It seems to be running cooler than other 8800GT's. One guy claimed to have overclocked it to 740mghz.
Let us know if you get it.