Hi, I liked your article. Also I have all the same hardware as in your article so one should think it would work. I run a Vodafone Merlin U740 on a DELL410 laptop running Unbuntu Feisty Fawn.
However – it does not run. When I double click on the network monitor item,. it displays an error message and says:

SIOCGIFFLAGS error: No such device

Any clues how to follow up?
Greetings from the Netherlands,
job