I am currently developing an Outlook Add In to synchronize Joinup.ch events to your Outlook calendar. While development is getting more and more streamlined (event with Visual Studio 2010), deployment was and still seems to be difficult.
Unfortunatly, depending on Office Versions you are targeting, prerequisites differ, and even more unfortunate is that the installer which is added to your VSTO solution doesn't seem to check for those prerequisites.
An extensive blog article / walk through can be found here.
Still not the easiest thing on earth, this walk through provides alot of necessary background information.
Good luck !
Denis
