[AccessD] New Languages (that may not be new to you)

I'm reading this book called VBA To VSTO. Somehow I missed this boat. It was
installed but I never noticed it. Then I spotted this book at the local
library and discovered that this was released with the Office 2003 pack. So
at a casual guess this would imply that I am 6 years behind the edge on this
subject.

Has anyone on this list written anything VSTO-specific? If so, would you
care to share your experiences?

I'm a bit of a slut for new languages, and some of what I call new have been
around the block for decades. RoR, Python, etc. I play with them but have
never done any professional (e.g. paid) work with them.