Speaking of which, I've been experimenting with high ISO shots. Certainly not great IQ, especially with a T1i. But in a pinch they work pretty well, especially with a bit of PP. This shot is 12800 ISO. My 85mm F1.8 wide open at 1/30sec. It would be very cool to be able to shoot in this ridiculously low light at this speed and not have a ton of noise.
(And yes, I know, my cat is a lint magnet.)