JetPens *is* pretty darn rad. Thanks for the links! I hadn't thought of using tiny brush pens rather than tiny round-tipped markers for fine line work, but you make them look pretty good, so I'll definitely be giving them a try.
I'm using Copic's Multiliners currently, which I like (nicer than Pitts, which are the only other kind I've tried), but the tip on their "small" brush pen isn't all that small and tends to lose its shape--and I *have* been drooling over pictures of Kuretake's sable hair brush pen: [link]
= oooo I don't know why I want it since I have Raphael brushes which I adore, but...man that thing looks sweet.