I have a Meteor app in the app store (built before this official support) and had no trouble with the approval process. The ability to update over the air is quite nice. The only time you have to resubmit to apple is when you update the objective c part of the phonegap project.
I get that, but I'm not sure Apple is aware of this advance yet.
Personally, I really like it. Waiting 6 days for an update sucks.
I'm thinking of trying this combo for some quick projects, are you generally satisfied with the speed and responsiveness of your app?