One note of caution: Rendering on the client side using jQuery Templates as the author suggests is great for small amounts of content, but even a list with 40 items will nearly freeze the UI while its rendered. I've experienced this on both iPhone and Android.
Also, using a cache manifest will cache your AJAX/JSONP calls. Either explicitly list these URLs in the network section of your manifest or add a timestamp to each request so its unique.
Needless to say, the best advice I would give (that others have said here as well) is to avoid frameworks like jQuery Mobile. There many other reasons too...not least of which is that jQuery Mobile doesn't work on T-Mobile or O2 in the UK and parts of Europe. It appears these networks intercept all traffic and try to minify the JS and CSS before they deliver it to the phone. There is some part of jQuery Mobile that they choke on and the page doesn't render correctly. I've tested extensively using Perfecto Mobile and even the jQuery Docs & Demo pages don't work right (so I know its not just me).