I wonder if I were to develop a mobile Web app (now, in two weeks, or in a month), which one should I go for? Which one would you mobile Web developers go for?

If jQM 1.0 were officially released today, I would most likely embrace it (as long as it actually delivers what it promises). Now that it is in alpha, I wonder whether it is worth to jump into it yet for a commercial grade project? Would Sencha Touch be a better alternative?