I experienced my first sidewall blowout this morning on the way to work. Fortunately, it was on the rear wheel, so the extremely fast flat didn't really have much of an impact. As far as I can tell, there was no good reason for the failure; no brake pads rubbing on the tire, fender was clear, etc. I had been using Continental Gator Skins, as they are a kevlar lined and should have helped prevent flats. After going through three tires now, none of them making it 1000 miles before failing, I've decided to give a different tire a chance. I've switched over to a Panracer touring tire, let's see how it deals with commuting.