You mean a gaming console, like if you registered a domain called xboxstuff.com or something?
I really don't know anything about the subject, but I imagine some could consider it a trademark infringement (but can something be considered a trademark infringement if it has no negative effect on the holder? ie. fair use laws). Unless you're selling playstations on the site I doubt they'd care. Look at
http://xboxcheats.com/ for example, obviously a 3rd party site earning ad revenue but not hurting microsoft or the xbox brand in any way. At the top it says "an Xbox.com partner site", maybe that has some legal significance?