I’m in Seattle at the moment and have discovered the GREATEST radio station. If you are in Seattle, it’s 90.3 KEXP.
If you aren’t in Seattle, they webcast on http://www.kexp.org
I emailed a Swervedriver request and they just played “Last Train to Satanville”
Another cool internet station is http://www.radioparadise.com
(even though they don’t play Swervedriver, at least not yet!)