Have you seen any good examples of iOS apps made from HTML5 with PhoneGap that are actually good?
I'm also a fan of the Travelocity Android app, which was built with PhoneGap.
PhoneGap does not make good apps.
I'm building mobile app with HTML5/CSS3/Backbone.js/PhoneGap and it's an excellent stack that allows you to build native-like apps for multiple OS's. Everyone I've demo'd the app to has no idea it's not written in Obj-C..
While an iOS designer like myself sees a lot of telltale signs it's HTML (the flicker of loading buttons' assets for example) it looks very nice.