I have a few bikes that run tubulars, but they are just "spares" that have gone out of my rotation. My oldest brother however, still is a tubular man.
We were just discussing tubulars a few days ago. I forget the brand, but he runs a little bit of Stan's in his, and doesn't get flats. I have a pair of Tufos that have managed to stay pumped to the moon for years it seems. I am sure those tires have outlasted the tubular cement by about 5 years!