The Wangan Midnight Maximum Tune 2 soundtrack has some amazing tehcno in it. I believe it's on GH. Also there are a bunch of DDR and Beatmania sountracks with techno on here. Probably like 40 albums total.
Wangan Midnight Maximum Tune 2 OST (
http://gh.ffshrine.org/soundtracks/2707)
If your just looking for techno in general, may I suggest this website:
www.di.fm (
http://www.di.fm)
It's a digital radio station. There are about 9 different generes of techno to stream. All the track and artist info is listed on WinAmp as it's being played. Also you can just browse the website for whatever is currently playing. Under the specified techno station will be a link that says Recent Playlist History. Just click on that.
I would give you some artists but there are SOOO many kinds of techno, that it would be impossible for that to help.
Hope that helps. Learning a new genre and trying to find new bands and artists can be daunting. I've been doing it for 8 years (i listen to EVERYTHING), so if you ever need help with finding out about a new genre just PM me.
GOOD LUCK!