My novice advise to HP is to provide something no one else has and that will get people compelled to buy their webOS devices products apart from their UI.
iOS has everything Apple.
Android has everything Google.
WP7 has everything Microsoft.
What does HP have to offer? And, printers are not going to sell webOS. One suggestion is they should provide a syncing portal: I call it “webOSync.” Connect to your computer and sync everything you want. Knowing Palm, they will take it to a whole new level and beyond. But, that still falls short.