Jim,
My 150 gallon reef tank is nearing its first month of operation and I've got some live fish that would look great in SSA (at least, I think so).
http://www.ricosweb.com/ReefTank.asp
I have a Dragon Goby that picks up mouthfulls of gravel, swishes them around, then spits the cleaned gravel out its gills. Here's a picture of him: