you get an emailed invite from 'meetyourmessenger.com' as follows:
Mark has sent you an invitation to join Marks messenger network. Click the link below to see the invitation:
If you wish to report this as spam, please click the link below:
Report as spam
When you go there, it asks you to sign up and wants your MSN log in and password. once you do this, it invites everyone on your contacts list.
the problem is, they then have your msn log details! its not even a secure site, and holes / scripts have been found in the site that could / do send the details elsewhere.
remember, never give any details to sites you dont know. but if you have signed up to the above and do give these details away willy nilly, then please contact me with your credit card details, and i'll fix everything for you!