My tank is somewhat planted, with some artificial mixed in, and some cave/bridge/castle hiding places. But I lost the nerve. I think the shrimp are really cute, and don't really want to watch them be torn to bits. Thanks for all of the advice!
I did accidentally get a ghost shrimp in with some guppies I bought once, and it lasted about two weeks before it ended up dead. Looked kindof twisted up, but no one was bothering it. Hmmmm...