Based on the hacking done by @stroughtonsmith I have made an ipcsc file for Telia DK to enable tethering (shared internet) over USB and bluetooth. You load the file to the iPhone by ALT-clicking the "Search for update"-button and selecting the file. Here's the file: Telia_dk.ipcc

Sending MMS using this profile does not work, but when someone on the internet figures this out I will update the file.

Another nice thing with the 3.0 update is support for danish letters ÆØÅ in the keyboard.

UPDATE: THIS POST CONCERNS THE BETA OF OS 3.0. TO GET TETHERING ON THE GM SEE http://c4d.dk/fa-tethering-samt-mms-pa-os-3-gm