Brainstorm

Create a new applet (maybe Python based) with modules. These module may devide into triggers (WLAN change module, GPS module, menu-click module, dbus module) and actors (change bluetooth state module, change ringtone module...). The applet itself has a small database (or just a config file) which defines triggers to sequences of setting actions on the to be used actor modules.

This makes it possible e. g. to use existing software (like openvpn) and interfaces (dbus) and can be extended if some new stuff for triggering or acting is created: cool accelerator app: trigger if running; play music, so play music if running; send SMS if heavy accelerator action - accident.