Back in 2005, I helped with the launch of the Microsoft Dynamics GP 9.0 release by managing a 22-city partner readiness roadshow, and several other activities. Roughly, a year later I moved into a different role at Microsoft, but I'm constantly impressed with the numerous updates going into the latest releases of our Microsoft Dynamics products.
On a related note, I ran across a new guide on PartnerSource covering the key functionality updates that span the past three releases of Microsoft Dynamics GP. The last three releases are 9.0, 10.0, and Microsoft Dynamics GP 2010. This 3-page guide is fairly simple to navigate and highlights a lot of great functionality that you can share with your prospects and existing customers.