I could have sworn I read something about this on here, but I can't find it despite ultiple searches
. Oh well, flame me if I missed it.
What I tihnk would be useful is a plugin that triggers a PC's internal speaker beep when a message is received. Some apps prevent MSNMsg's sounds to be heard, and a PC speaker beep is an inoffensive way of alerting you have a message. Of course, it can be dressed up, with an option to disable Messenger's usual sounds automatically, yadda yadda yadda. I'll leave that to the creativity of the ingenious programmer who'll take this on!
Shouldn't be too hard, I hope!...