I so wish they'd put the old stuff on Steam. At least from WC3 back. The only problem is they got a good matchmaking service already with Battle Net.
But for WC1 and D1 that wouldnt be an issue either way.
Oh, and if they did put Wc2 up they'd need to figure out a way to do the CD music, or improve the wave music or something.
Activision-Blizzard knows they can sell certain products like this, and this way they get a bigger cut by selling directly.I wish they'd put their new stuff on Steam. I'd love to play Starcraft 2, and I'd really like to play Diablo 3 as well. :'(