It's been about 20 months - the time I spent doing a post-doc at Cornell - but the Euro is back on the road!
(Not officially just yet: I still need to get insured / new plates.)

I retensioned the belt (~5K miles) thanks to MikeB. It was actually too tight (~4 on the gauge, rather than the 2.7 recommended by Clark's Garage for re-tensioning. Also, I had to replace the master and slave cylinders. Bleeding them went smoothly, which I didn't expect based on reading some older posts. Other than a couple of minor electrical problems - which I expected - the car is running as smooth as ever: clean oil, new coolant, all bushings and bouncy parts looking good! Basically, it's been a couple of weekends of cleaning the interior and mechanical work: Super Fun.

I'm pretty happy to have it back... it's been a long couple of years.