Last week I did a presentation in Bunnik for the SDN on VSTO. The title was VSTO – No Pain No Gain. The presentation went quite well and I think a lot of people learned about some of the hardships of developing VSTO applications and how to get around them. Just remember VSTO is real cool but de dependence of the team on Office and the fact the they have to ship both with Visual Studio and Office, who are on a very different shipping schedule, presents some unique challenges. Still a very cool tool.
You can download the slides and samples here.