for personal wireless router QOS/ traffic throttleing you usually need to look at the 3rd party firmware and buy a compatable wireless router that can use that, its techy though, not for your average Nooby user.
http://www.polarcloud.com/tomato
http://www.dd-wrt.com/
http://search.virginmedia.com/result...ty+firmware&cr=
some versions of the Linksys WRT54GL support thems depending on the revision of the internal board.