I just got a mail from MSN Groups informing me that the calendar feature will be removed for non-subscribers. Much like the limitation of the inbox storage when MSN Hotmail became a member service, non subscribers will still be able to view a calendar but not edit it. The mail is below:
This message is to inform you that the calendar feature of MSN Groups will no longer be available as a free service beginning August 7, 2003.News source: In-House
To provide better service and usability, MSN Groups will begin using a subscription-based MSN Calendar in place of the current one. We think your members will find the new Calendar much easier to understand and navigate. Non-subscribers will still be able to view the calendar and appointments, but only MSN subscribers will have the opportunity to add and change Calendar events.
To take advantage of all the great features of MSN 8 and to have complete access to the updated MSN Groups Calendar, you must sign up for MSN 8 at https://join.msn.com?pgmarket=en-us.
The MSN Groups Team