As someone working on a phonegap project, I'd really advise against committing to this framework for mobile app development. It is good for really quick and dirty proof of concept things for devices, but for fully fledged mobile apps on iOS and android, there is an enormous gap in terms of performance. In order to get performance at least on par with native, you'd have to sacrifice TONS in terms of user experience.

Want gestures? You'll have to look towards things like iScroll and hammer.js, which work "sometimes". Add that to framework issues, and momentum based scrolling that you will have to implement yourself numerous times... Oh boy. Basically, things that come out of the box on native will have to be manually implemented by yourself, and none of these solutions will even come close to native experiences.

Add this to the fact that phonegap documentation is all over the place, and all you will get are senseless headaches. Save yourself the frustration of hacking the web into a mobile device and go native all the way. You will thank your self later.