I think I have a wireless route lying about somewhere, If I have some spare time I'll dig it out and try it although I'm not promising anything as I don't want to be bogged down trying to fix a feature that I won't really be using.
As to the device name, as the E220 is a generic model, it can't see it not being /dev/ttyUSB0. You can find out by typing in terminal:
This will display all devices that begin with tty. It should be one or the other.
Also remember, you will have to change the details for your mobile network and it's DNS addresses. I think somebody posted a website with the DNS addresses of all the major UK networks.
Edit: Wireless does not work. I typed in the command iwconfig which displays details of wireless connections set up and there is none. I was thinking, this might actually work without the need for the E220 drivers. Can someone please give it a try and confirm if this is true.