There are hundreds and hundreds of posts on tubeless tires in the Road and Racing forums, but the only thread I could find here with any significant (5 replies) discussion was from late '08/early '09. The thread here mentioned them being pointless/unreliable/potentially life threatening, but I'm wondering with the several years on the market since those posts if any of those opinions have actually proven out to be true?
I'm doing my LD riding (mostly organized double centuries) on a recumbent; for years I was doing it with a 20" wheel (406) on the front, 700 on the back and had to deal with the hassle of carrying multiple sizes of tubes, and potentially carrying multiple tubes as backup (certainly for a rando I'd need to carry my own to be self sufficient, but on an organized ride there couldn't be any expectation a sag wagon would have a 406 tube either). I've recently switched to a bike with 700's front and rear, and with the hopes of increased reliability and all the praise I'd read for it elsewhere, bought tubeless tires. I'm using DT Swiss RR465 rims and taped them up to be air tight, rather than buy tubeless-specific rims.
So far (350mi on the rear tire, 30mi on the front), so good. My first double with the setup will be this weekend, and I don't see any reason to worry. I wonder though if that is being foolishly optimistic.
Are Long Distance riders using tubeless now? Is it ready for prime time? I'm using Hutchinson Intensive tires (700x25, cost ~$60/tire, though I've read they may soon offer 700x28) and from a size perspective they're fine for the riding I do, and from a cost perspective they aren't any more than the Conti's (Gatorskin and 4000s) that I have on my other bikes.