regarding speed: I played a few HD remuxes now with madVR and ffdshow on my system (c2d @2800, 400MHz bus + 7600GT). most stuff starts around 30fps and then very(!) slowly pends down to little above 24fps (but mostly doesnt reach 23.9 fps). but the picture is actually never really fluid and theres can also a very little audio delay perceived. guess my hardware is a little too slow, at least for v0.1. seems to be a little faster with coreavc instead of ffdshow, but not as fluid as ffdshow or coreavc with haali.
edit: another little things, step forward (right arrow button) in mpc also doenst work yet