Yeah, there is a guy who just tweaks an Echoplex for the whole set. Back in the day (according to a friend from the Bay Area), when they played much smaller, closer venues, they would run pretty much all of their instruments and vocals through this one Echoplex, with this one guy twiddling the knobs, resulting in a cyclone of swirling proggy delay goodness. I don't think Marymoor was the best venue for that sort of effect (obviously), but I thought they sounded great.

Heather, if you're interested in a little perspective, here's a review I wrote some time ago for the now-defunct Mercurial Sound of their album Avatar: http://mercurialsound.com/archives/new-music-comets-on-fire-avatar

I'm not saying it's a great review or anything, but it might give you a different angle on the band.