I built a rig into one of those Saturday night. I must admit it was nice to work with. The styling wasn't exactly my preference though. There were several places I felt it could have used some improvement, though small.
The other 2 draw air upwards which, although they aren't directly on the outside of the case, they draw in a surprisingly large amount of air, especially the one between the PSU and mobo secions
The HDD breathing system is pure genius, though! Air is drawn from the bottom, passed over the HDD's, and exhausted out BEHIND the mobo tray through the vents, also located behind the tray.