Wet-Dry Vacs

Instapundit points out that if you have to have one, you really have to have one. My dad received a wet-dry shop vacuum as a present some time ago. Their use of it is uncommon but urgent. I know they've bailed out one of their neighbors after their basement flooded. I'll have to plan on getting one at some point, but I'll probably need a shop before I bother with a shop vac.