I make no bones about it, I like HP's (nee Palm's) webOS platform. The operating system is beautiful, the community is incredible, and the development process is a charm.
Becoming a webOS developer couldn't be easier -- or cheaper, for that matter. It's free. As in zero, zip, nada. Just sign up at the HP webOS Developer Portal. Community accounts will give you access to play around with the SDK and post in the forums, but you'll need a Developer account to publish apps in the App Catalog. For that, you need a PayPal account (to get paid) and a business tax id number (to pay the government).
By itself, PhoneGap isn't enough to make a quality webOS app. You need to add the functionality in bits and parts. As I discover more pieces of the puzzle, I'll put together posts and tutorials on the process. This blog will hopefully be an aid to others on the same path.