Is there a way to get XMMS2 to call an outside script when it advances in a playlist - either automatically or via manual intervention (e.g. xmms2 next)?

The goal is to have balloons pop up on my desktop to tell me what new song has started playing, and I really, really don't want to write a background daemon that polls 'xmms2 info' or 'xmms2 current' if there's a way to get it to issue the callback.

Thanks in advance!