My girlfriend is an old-time technohead, and she'll often grab an hour of streaming audio with AudioGrabber, to throw into her MP3 player for jogging the next day:
http://www.di.fm/wma/classictechno.asx
Fairly driving beats, if at times a little spaced while they blend trax. I think there's a higher-res version or a bunch, but forget the page. Anyway, plug your PPC into your stereo and crank it up with this playing and you'll have commercial-free techno of reasonable quality.
She's also introduced me to DJ Krush, at times fairly intense. And I'm even groovin' the odd time to vintage YMO, but don't tell anyone.
[Edit; found the better grade techno stream -
http://205.188.234.65:8020 - plays phenomenally well in GSPlayer over Wi-Fi.]