The short version: as of Wednesday night, I play banjo.
(a) Thanks to syntonic-comma generously lending me one, and a Homespun Ceilidh Band project that kinda called for it.
(b) Not at performance-quality skill level yet, but what I did in rehearsal the night I picked it up basically worked[*] and I have a couple more weeks to polish up a few tunes. I've got a whole lot of practicing ahead of me, but no significant worry.
(c) It's fun. I need to find a way to acquire one of my own when I give this one back!
Are folks interested in the long, rambling version?
[*] Learning a new instrument that quickly is easier than it sounds, when it's basically yet-another-lute and you already play half a dozen other lute-type instruments. Even easier if you've messed around on a guitar in sort-of-banjo-like tuning a little bit ahead of time to learn some of the chord shapes.