Ha - that is a very good point and one I hadn't even thought of. I may
have to simply install support for various servers. Are there any
servers other than Libre.fm right now? If not, it might be worth
simply defaulting it to Libre.fm for now and removing the ability to
configure it. Alternatively it is possible to simply open up the
permissions to "all websites" but some people may be uncomfortable
with that.
Until there's more than one server - it would be easy to simply lock
it down to Libre.fm.