After hacking up a proof of concept for the iphone (thanks John for your awesome iphone JSON flickr tutorial and xcode example for download) and thinking of how to do the same for android without duplicating effort, I realized that it would be nice to be able to have some kind of middleware that allows me to create and populate native gui components without code duplication.
I have two problems with the approach:
The advantage on the other hand appears to be that it is relatively easy to add new mobile platforms to phonegap. So far they appear to have iphone, android, blackberry and some nokia platforms covered, with palm pre being on the horizon to be added beginning of next year.
And according to phonegaps website, there are already several real-world phonegap powered apps in the marketplaces of both the iphone and android.