Here's something I'll be trying this weekend.
Yesterday, Via Virtual Earth announced a new and very cool service that allows MSN Virtual Earth users who also use MSN Messenger the option to share maps with other MSN Messenger users (individuals or groups). Very cool! This items was first posted late last week on the Virtual Earth Blog. You'll find more info and screen caps on the 25HoursaDay blog and on Chandu Thota's WebLog.