Jumped on the Conti Grand Prix bandwagon. I just ordered two from eBay for $35 each (Biketiresdirect was sold out), and Conti tubes from poweroncycling.com. They'll be taking the place of IRC Metros. Hopefully they'll be faster and more more durable -- I've gotten a few too many flats with the Metros. And I think the narrower width will make them a little easier to skid (I'm riding brakeless fixed).

I swear I must have the oddest fixie in NYC. Not only is it a 20" folder, I just put on Midge bars, which you usually see on MTB's. I'm liking the flared drops though; they feel really stable when I'm out of the seat.