I'm thinking of going with a Stan's (or Joe's!) set up with my existing non-UST wheels and tyres. I'm not going to go UST because of the cost, and my only problem with Stan's is, errr, the cost - £45 for two wheels Stan's/Wiggle, £40 Joe's/CR - but then lots of people say they have no flats with this system, so maybe that's worth £45.
The main cost is in the rim strips and it would be cheaper to use a cut-down BMX tube as in the Oz link above, but I don't fancy wasting weight, I like wheels to be light. A Stan's rim strip weighs 60g plus you put c60g of sealant in, so that is actually lighter than a tube. Whereas a BMX tube must weigh heaps. Also the Stan's rim strip has a removeable valve core, which is a big advantage and it fits properly. As the Oz guy says, every six months or so the sealant goes dry so you need to inject another 60g and the tyre would get heavier and heavier, so every once in a while you need to take it off and remove all the dried-up sealant.
How about riding? Obviously you can run lower pressures once you don't need to worry about pinch flats, so you get better grip, but it's also said that the tyres roll better so you get no speed disadvantage from dropping the pressure, anyone find that?