I tried and tried to get RedKaraoke to work tonight from a little Windows Netbook we have -- installed Flash, installed Java... installed my M-Audio FastTrack Pro drivers... yet could not get audio AND video to work. I got one or the other. Very frustrating.
Those of you trying it -- all I can say is they seem to have a GREAT catalog of stuff to sing FREE but... it's a pain to work with... IMHO. I'm done trying there for the night... exhausted... G'night and happy singing!