To Make your Option 225 (Also known as T-Mobile Web 'n Walk Stick) {Not The new Internet Stick, Thats a Huewai e176...} work with Ubuntu (Tested on 8.04 - 8.10 - 9.04) you'll need to do this.
It will download a package from my website with the latest option driver (1.12) and 0zerocdoff (Specially prepared so that it will not autosuspend), hsolink (Latest) and HSOconnect 1.83 for python2.5 (The best version, 1.128 gives me problems).

Bold steps can be pasted in the terminal, the italic ones need some reading...

sudo apt-get install build-essential

Only for ubuntu 9.04: sudo apt-get install python2.5

mkdir ~/.optionhso && cd ~/.optionhso
wget http://relst.nl/downloads/option225.zip && unzip ./option225.zip
cd option225 && cd drivers && cd hso-1.12
make && sudo make install
cd ../ && cd udev
make && sudo make install

then you need to edit the file /etc/udev/rules.d/51-hso-udev.rules and place a # before line 12. (Comment it out)
sudo gedit /etc/udev/rules.d/51-hso-udev.rules
Place a # for line 12 (The line below: # enable Selective suspend in USB core system by a helper script)

cd ../ && cd ../debs
sudo dpkg -i ./*

Then reboot, and plug your stick in, open up HSOconnect from the menu, and you are ready to go!

Note! - All the programs and drivers are made by Pharscape. I cannot be held responsible for any damage to your computer or other stuff. As far as i know all the software is GNU GPL.