[Draxis]

I for one really like steam - I dont have to bother carrying a hard copy around with me, and unlike the lame D2D service which I hope is already dead, with steam you can install on as many comps and redownload as often as you need. Patches are all taken care of, downloads are fast (most games its quicker for me to download than go to town and find the game) and prices are good. Its got an easy interface, doesnt mess me about, and the 'friends' feature is really handy.

As for torrents...cant you just spoof the tracker and upload garbage? How much validation on data can a client perform? Assuming they use a CD image, broken bytes here and there could cripple it. If that were possible, imagine how hard it would be to get SE:V off a torrent if every leagal owner was uploading junk data.