I work at AppMobi and I'll just make a few comments.
You're app shouldn't be rejected for being cross platform using a native webview. We haven't had Apple use that on any AppMobi submitted apps.
Rhombile isn't "Made by google". In fact, it's not even the part of Motorola that Google bought, it's their business division. They are pushing towards HTML5/Javascript but currently Ruby.
Appcelerator started out supporting a webview, then backtracked. They just raised a ton of money to go back to the webview suppport.
As to people saying "No" to the cross platform apps. Facebook and some other major companies are moving towards HTML5 based apps for mobile.
