<< Rain Man - were you able to add a second (or third)fan? I would presume in the front of the case - did this require modification? There seems to be no external venting. >>
I have one case fan in front - there should be a large plastic bracket where a 80mm fan should fit in. There is no intake vent in the front bottom part of the case, so I drilled some holes and cut open a large rectangle in the bottom part of the front case (the plastic thing that comes off).
<< Does this accept a std ATX mobo? Was power supply clearance an issue or any other peculiarities like connectors? >>
All Infinia cases will fit ATX MB's. I have a Abit BX6-2 in mine. You'll need to get a new power supply if you plan on using a cartridge CPU or a slotket, because the 92mm fan on the power supply will get in the way.
The only other issue is that the back of the case allows only six cards - the AGP slot will most likely be covered up, so you'll have to cut open a slot in the back. Also, if you do decide to still use the Infinia case, make sure to remove the rear plastic covering and leave it off - there are vents that cover up the air flow from the power supply fan.