Nitobi just released version 1.0 of the mobile app framework Phonegap.
Phonegap enables you to write HTML5 and javascript pages and compile them into a mobile phone application (app). Phonegap currently supports iOS, Android, Blackberry, webOS, Bada and Symbian.
Phonegap also gives you some java script functionality that lets you use the GPS or accelerator in the phones.
Some big companies are taking part in the development like Adobe, IBM, Alcatel-Lucent, Cisco, Logitech or Time Warner.