I am still digital camera-less, so I don't have a picture...but here is a description:
Golden-bronze shell, slightly ovular/conical. About 1 cm long. Not nocturnal. Seems to enjoy eating crud off the glass. Often, floats on the water surface (upside-down with a big bubble on its butt) eating crap off the surface.
So...any ideas? I think it came from some plants I got from floridadriftwood.com, but I am not sure (I've gotten plants from a few LFSs). All plants were soaked in alum for about 24 hours and I didn't notice the snails until a few weeks after purchase.
So far the plants seem unaffected...so for now it'll remain in the tank.