Welcome to the forum, trekman!
There are a few different options out there. One is to go with speakers that have the wireless receiver built in. Another is to get a separate wireless system and hook it up to a set of regular speakers.
There have been a couple of reviews on the Audioholics site for speakers with the receivers built in,
this one and
this one. I had looked into a couple of wireless systems to use with my regular speakers (mentioned in the thread
here, but prices have changed) - there are other wireless systems that contain built-in amplifiers.
What sort of stereo are you wanting to hook up to this?
Adam