I can't quite find the exact date, but CPU Magazine has been working with us since as far back as October 2008. They have consistently supported us throughout almost our entire history, where they could. Primarily with magazines and swag (cloth mouspads!), usually sending us way more than we asked for too!
I know that not everybody read their magazines at our LANs, but I for one quite enjoyed peeking into cool gear and other LAN parties going on in North America, while leaning back at my chair at the LANs.