The subscription for 2007 covers minor version updates including bug fixes, symbols updates and online capabilities. It doesn't cover major version updates such as 2007 to 2010.Having said that, we haven't announced pricing yet for 2010 and our policy has always been to offer existing customers a great upgrade price.
This is also one of the reasons why we want to go through a Beta cycle for 2010 so that we can get feedback on features and pricing.
As a current subscriber, you will be able to enrol in the Beta program so that you can give us your feedback directly.
All current subscribers will be emailed in the following few weeks with further instructions.