Check out titanium here.
You’ve got the ideas, now you’ve got the power. Titanium translates your hard won web skills into native applications that perform and look just like they were written in Objective-C [iPhone and iPad] or Java [Android]. With over 300 APIs, a thriving developer community, and the support you need, you can build applications that are more social, local, media rich, interactive, and extensible.
This MinneBar session was presented by @KevinWhinnery.