In our never ending quest for fat, quality tubulars, World Class Cycling just announced that Veloflex has put out a 24mm model, appropriately called the Roubaix. Unfortunately color is all black, but that's better than yellow or green. Price is also steep, $79 a pop. But Veloflex tubies are very nice.
Pictures here: http://www.worldclasscycles.com/
Price list: http://www.worldclasscycles.com/
They're cheaper if you buy 10 ($72). If you're thinking about it, maybe you can ask some list members to join and buy with you to get the discount.
Tom Adams, waiting for the 25mm Tufo, Shrewsbury NJ