From what we've seen, the so-far implemented parts in jQuery Mobile work great in a majority of the mobile browsers. I think the prolonged alpha stage is mostly

From what we've seen, the so-far implemented parts in jQuery Mobile work great in a majority of the mobile browsers. I think the prolonged alpha stage is mostly due to their extremely ambitious browser support goals http://jquerymobile.com/gbs/ http://jquerymobile.com/gbs/ and relatively vast feature pool. But, as I said, the stuff that has been implemented, is really stable in mainstream browsers (at least iOS/Android).