The G80 based Geforce 8800 Ultra will have a bigger cooler. The cooler will be taller than the card itself and it will cover the rest of the PCB. It is bigger than the Geforce 8800 GTX reference cooler.
The cards are expected by the end of the May and Nvidia still haven't officially confirm any clock speeds. The card is coming and as far as we know, it will make the Radeon HD 2900 XT and XTX run for its money.
The fan actually sticks out of the card on the top side.