One of the features that I really like about Chatter is how it can be configured to vibrate periodically if a message is received but not read (under Pref->Notifications->Vibrate every X secs). However, I would like to be able to configure Chatter to play an alert along with or instead of the vibration, but I couldn't figure out how. Does anyone know how to do this, or if it is even possible?

Marc, if Chatter doesn't currently do the above, then please consider this an official feature request from a paying customer.

Thanks in advance for any help!