A pre-beta version of ManaLink, the multiplayer feature of Magic: The Gathering, at the M:TG World Championships, will be shown this week in Seattle. ManaLink provides head-to-head play over the Internet, as well as LAN, modem, and serial capability.
ManaLink is scheduled for a November release. Until then, prospective players can check its status and talk to other fans at the official M:TG site at GatheringNet.