I use myp2p on my laptop with the video plugged into my telly and the audio send to my stereo.
Got another laptop ordered that has HDMI output so hopefully that'll be just even sharper.
Sometimes I can get the games from myp2p on my PS3s browser, unless I need more software. This is oviously a bit better as I don't need the extra cables.
It's a problem but I don't think I can install sopcast and other software on my Ps3.