It's real-time - I get about 10fps over a wireless network, so it should be a bit smoother over a wired network (I only get about 3mbps over wireless with encryption enabled).

Found out something else neat today too - you don't have to press the buttons - the arrow keys on the keyboard will control the four buttons just as well! Awesome!

Clients are available (free, of course) for a huge number of platforms from here.

A.