A recent addition to the teamstinct feature set is configurable audio alerts.
Audio alerts are actually really useful - it means you do not have to directly interact with the teamstinct application to be informed of new group messages or notifications - you do not even have to be using your computer. You can be in the office, meeting room or just watching TV and teamstinct will let you know when you have a new message waiting for you (of course, your computer will have to be within earshot!).
There is currently a choice of six high quality audio alerts (recorded by teamstinct) and you can even configure the volume. If you are a current teamstinct user, just go to your 'My Account' page to enable audio alerts.