O.P. RE: MessengerFlash is here! (Formerly known as ThunderboltAllertor)
As I have said before (Because of Microsoft's window name recycling) MessengerFlash 1.0 will work with Windows Live Messenger Beta. This does NOT denote a bug free operation.
MessengerFlash v2.0 will unlikely be released until Windows Live Messenger has finished Beta. This is because some elements that MessengerFlash uses may change before WLM goes 'Live'. No pun intended.
Any other programmer like myself will know about this.
I will run MessengerFlash along side WLM and see if any issues arise.
I do have a strange bug where if I close (minimize to tray) WLM it will crash and Windows Bug Reporting fires up.