Finding out if an IP address is connected

[brentmj]

I run a station on SAM and can take requests. The requests play automatically or if I'm around and monitoring the station, I will alter how the requests are played. If a request is old, I always pop over to the shoutcast admin page and make sure the listener that made the request is still connected before playing it. Otherwise I throw it out.

I would like for the automatic request handling to be able to do this as well. Is there a way to query the server via an HTTP request to find out if a particular IP is connected. Should I be listing this in the feature requests?

Thanks!