Thats good that you ask this question John, Area 33 is the only Dance channel on Sirius I can listen to, except for (Dance Friendly) BBC1. I do think the playlist on Area 33 should be a bit bigger, but its kinda programed in a Hits format.
You see, Area 33 plays only the top most popular Trance and Progressive stuff around, so even though their playlist is kinda small, they dont play a bunch of stiffs. Everything Area 33 plays is either a big hit for the big name DJs, or its something getting a good amount of play on European station's.
What I am trying to say is, its pretty much a Hit Based Underground station if that makes sense. Its not just a bunch of random instrumentals from Promo Only like some of the Trance stations on Shoutcast.