I recently had a call with Microsoft Product Support services on an Exchange case at a large enterprise customer and the bottom of their email was mention of:
This is coming up quickly, and I have to admit I was not following this date. As IT people we sometimes let certain products go out of support, I’d say the email system should not be one of them and it’s definitely time to move forward to either Exchange 2010 or Office 365.
If you need assistance getting this project done quickly or are looking for outside help drop me a line via my contact page for guides or hands on planning and execution.