Generate Exchange Task From T-SQL

Our organization would like to add tasks to users' Exchange accounts from our SQL Server using a USP. Basically, we are looking for the same functionality as the xp_sendmail syntax provides, but instead of sending an email to a user, we would like to create a task in the user's Exchange Tasks folder based on the information passed from our database via the USP.

Here is an example:

A client must receive paperwork every 6 months based on a date stored in our SQL database.
2 weeks prior to the date the paperwork is due, a USP would detect that John Doe has upcoming paperwork needed.
Bob is John Doe's sales rep. The USP would create a new task in Bob's Exchange Tasks folder indicating that John Doe's paperwork is due on such-and-such a date, setting reminders, etc.

We are currently running SQL 2000 and Exchange 2003 in an Active Directory environment. Any help or pointers would be greatly appreciated!!

Thank you - Jeremy