i think it's possible if you buy an eyetv hybrid. it costs though.
I don't think that has anything to do with playing video games.
The price doesn't bother me. But after looking around, it seems there is some significant lag (couple seconds). So I might just not bother...
Don't bother - my Wii looked awful through EyeTV and it's only in SD - imagine what it would do to those lovely hi-res visuals! Also, the 'virtually lag free' operation is crap - it's really noticeable.
I'd just buy a second 20" monitor and put it through that.