We love Blizzard's popular game, Diablo. We love it so much, in fact, that we're willing to spend our precious time developing a free and open source solution for those wanting to play it on a modern computer.
Short answer, yes. We don't distribute any copyrighted game assets, which means you'll need to have a copy of Diablo to be able to play.
Another short update - I made a media section with some screenshots + a basic video: here
BTW: If any of you out there are good at web (or just ordinary) design, it would be nice to get custom wordpress + phpbb themes (that match), and/or a freeablo logo.