I'll post pics eventually, but I finally got my own dedicated track bike built up and don't have to use the rental anymore. It's a lovely old chrome Plum Vainqueur frame (Italian made, distributed out of a shop in Belgium) with Miche components, 48x15 gearing, and a set of loaner wheels with Miche hubs and tubular tires. I got to ride it on the track on both Friday and Saturday. For anyone who has hesitated about riding sew-ups:
Oh. My. God. Smooth as butter. Sweet as pie.
I never want to ride clinchers again! Of course, just when I thought I was done spending money on bike stuff for awhile, I'm realizing that I'll need two wheelsets: everyday clinchers for training and nice tubulars for racing--which over time will keep the cost of replacing tubular tires down.