I have a digital copy of this game that can be downloaded on as many computers as I want. The multiplayer's pretty fun if you can get at least 3 or 4 people on at once (game supports up to 12 at a time). Can't have the one copy active on battle.net multiple times at once, but gameranger/garena work perfectly, unfortunately with windows only though.
If anyone wants the details to download it, let me know (rather not post them publicly) and we can try and get some games going. I gave it to a few PHM back in March/April and played with them quite a bit then. The game's pretty old (2002 I think), so it should run on pretty much any computer (works on my decrepit laptop at least). The download is about 600mb, and the expansion is 500mb or so.
Single player campaign is fun too, even if you don't want to play multiplayer.
Completely different game from World of Warcraft (had some confusion there before), it's an RTS game for those who don't know.