HP and IBM are not necessarily gaming companies and probably will not sponsor a LAN event, not to mention for consoles. Because consoles are primarily dependent on the company that produces them (Microsoft, Sony, Nintendo) they are ridiculous to find sponsors for. Luckily more companies are able to develop devices and games for the consoles.
One can just go to http://www.newegg.com/Product/ProductList….mp;N=2062760000 and gather a list of consoles as well as accessories and the companies developing the accessories.