How can I make Spark notify users when they come back from screen saver?

I have been using Spark for a while now. However I just recently turned on a password protected screen saver. When I come back from the password protected screen saver and somebody has sent me an IM, I have no way of knowing that person sent me the IM. That is, nothing flashes in the task bar, the toaster popup is already gone, and most times Windows sorts the IM windows that I have behind every other Window. Is there some way of getting around this?

Thanks.