As noted by both Mule1075 & Brandon, a Pinellas County feed has been running on Proscan for quite some time now. I believe it's running 24x7, as every time I've checked it's there. The only thing you need to listen to the stream, is the free Proscan client which is available at
www.proscan.org
I've attached a screen shot of the Pinellas County feed running on Proscan. The nice thing about Proscan is you get both the audio & video from the Uniden scanner being used for the stream. It's a great software package in my opinion.