I've heard tell of folks using Filter Queens for small amounts of water, too, though I've never tried it myself (and wouldn't want to). Though, when I was a kid, every now and again some snow or slush would get sucked into my parents' FQ, and it never seemed to hurt anything. I imagine the dirt soaked up most of it and the cyclone kept the rest out of the motor.
Then, obviously, there's things like the Water Matic and Silver King that are designed for some wet pickup.