Possible Multibox Machine Suggestion.

[Shrinrokon]

http://email.newegg.com/a/hBGu82wA1OQIjBUqNfLA$RwqVJP/nweg43
Would need a few tweaks but it should be good enough to multi box with.
http://img.photobucket.com/albums/v418/Shrinrokon/cheap-pc.png

[MrLonghair]

Nvidia 6150 for graphics, coupled with the work-arounds they had to use to fit it into that small package and price I think it will do rather well as client computers for multiboxing once you add another 512 megs of ram to it.

[Stabface]

I have toyed with a laptop with the 6150 graphics chipset, it got around 20 FPS in WoW. So I think it's a bit marginal unless you turn most of the graphics options down.