Great seeing everyone at the Droidcon NL. Here are some links and a pdf notes sheet from my presentation on PhoneGap development.
Tikal Time Tracker Project source code (including both iOS and Android Geo-fencing plugins)
Apache Cordova Android(PhoneGap source code) Github repo
Apache Cordova iOS(PhoneGap source code) Github repo
PhoneGap plugins library including the iOS version Geo-fencing plugin (Android coming soon)
Tikal Community Blog
iOS Developer for Tikal Time Tracker Dov Goldberg’s blog
Article about developing with PhoneGap