Hi,
I am trying to create a service for our users that allows them to share specific dynamic web content with their IM contacts through an activity. The closest equivalent I have found is the IM This function at the foot of MSNBC stories such as http://www.msnbc.msn.com/id/11783817/
On MSNBC this appears to work by sending the story ID (11783817 in this case) as the AppID to MSN messenger so that the correct story is presented to both users. According to the documentation however I expect I will be assigned a single AppID. Is there a way to pass more information to the messenger rather than display a generic page
Many thanks for your help,
Iain...

Messenger variables - IM This - dynamic AppId?
AMG44
Chris L60969
EDIT:
It seems like MSNBC is doing exactly the same thing, check the source..