https://github.com/swimmadude66/YTRadio became that new home. Its just a simple MEAN (with mysql and Angular2) app, but its worked for us for a little bit. It was written to be distributed, with one "room" per instance, including its own self contained chat.

We have our own instance running at https://lifeboatradio.com

Its still very much a work in progress, but I'd love some more feedback/contributors!

P.S. The name "Lifeboat" came as a joke that this would keep us afloat until we found a real replacement for grooveshark. At this point, its kind of a lifeship, since we don't do a lot of looking for other services anymore