These may not solve exactly your “real-world problems”, but perhaps something useful …
Our web site includes PhoneGap and jQuery Mobile tutorials for a media player, barcode scanner, google maps, and OAuth.
Also, my github page has code, but no tutorial, for two apps:
- AppLaudApp – a run-control, debugging enabling, download complementary app to a cloud IDE
- NameTrendz – an app developed in at Android Dev Camp to do a bunch of queries about popular name data. The PhoneGap and jQuery Mobile versions are from March 2011.