I never really have been into online radio; I just started listening to a station this past week and I think I've hit bullseye.

For all fans of House / Progressive music, Club One Radio on 1.FM is Godsend, IMHO. I'm sure there are a lot of other stations out there, and especially since this is one of the first and only that I've tried out, there's a lot more to explore. But I know I'm going to be listening to this for a while to come now. It's just the kind that I enjoy. I don't know if Posterous has a widget to play radio, so here's where you'll find this awesome radio station. Anyone who listens to any kind of House, Trance, Electronica, Progressive, Club music, come give this an ear, and it may just impress you like it did me.

http://www.1.fm/Station/Club/Default.aspx

P.S. - This station is also available on iTunes Radio under Electronica - that's where I found it :)