Playing a video game console on my iBook

[alpha5099]

I'm looking for a way to eliminate some clutter, and was wondering if I could use my iBook instead of a TV. I already have an adapter that allows me to display my iBook on a television. I was hoping there might be something similar going the other way, so that I could hook up some AV cables to my iBook. Is such a thing possible, preferably cheaply?

[Marvin]

It's not that cheap but it does what you want:

http://www.elgato.com/index.php?file=products_eyetvhybrid

"Connect game consoles to your Mac
Connect your game console and enjoy an excellent live play experience – EyeTV Hybrid’s uncompressed analog video signals appear on the screen with virtually no latency."

I haven't seen any cheaper Mac alternatives.