With their long and diligent service on the board, Jan-Bart and Stu are two of the best examples of something we should appreciate more in general - volunteers and movement participants who were not first and foremost active in wiki editing. I'm thankful they managed to break through the barriers we sometimes create for "outsiders", so that we could in turn benefit from their extraordinary talents.
In Jan-Bart's case, I believe his optimism and gift for making everyone feel welcome made it much easier for us to welcome him in return. And if you ever had a discussion with Stu, I think for many of us his desire to explore and understand movement metrics of all kinds (not just financial ones) helped identify him as a kindred spirit.
By focusing on their personalities, I know that I'll fail to do justice to the actual work they did on the board. I would likely fail anyway, given how much of it I've seen and the long list I'd need to make. But to be honest, I think who they are is as important as what they have done. Thank you, Stu and Jan-Bart, for being Wikimedians.
--Michael Snow