From Evolve Artists / Allen Creative Communication:
The Yahoo Space Toolbar by eVolve is a very popular tool among MySpace and GMail users. This is a free utility that provides instant notifications on your MySpace account. You choose what you would like to be alerted for such as New Messages, New Comments, New Friend Requests, Birthdays, Event Invitations, New Blog Comments and Kudos and New Video Comments. Also receive email notifications for your Yahoo Mail Account.