Yeah, unfortunately thbey are not showing the 2150 GT model as one of the new options..nor PWM, but apparently that 5000 RPM version will PWM control down to 1000rpm.

Regarding using 3pin fans in a MB controlled system. I think it's possible looking at the 3 pin pwm controller I built from pcbheavens design. If I understand it right, it basically takes a PWM signal from the 555ic and uses a power mosfet to amplify it. Seems logical you could do the same thing to a motherboard pwm signal. Just need a mini circuit that draws 12v from a molex connector, and convert the MB signal to 3 pin PWM. That might be just the ticket in converting MB temperature control over to auto adjusting your favorite 3 pin fan.

I'm just not that comfortable with the electronic details to design the circuit myself...