If you are in mobile development and not familiar with the Appcelerator Products, take a look.
They scored a bunch of money this last week, have cut a deal with PayPal and have announced new improvements to their tools. I personally think they are the one to watch in this space.
I have been using both PhoneGap and Appcelerator, but there just seems to be more money piling up behind Appcelerator, but who knows? they both look like viable platforms to me at this time.