Very timely for me. My cable connection got flaky at the weekend (277 bytes per second!) and I realised how much I depend on it for important stuff, like earning enough to pay the rent. So I was considering getting a 3G gadget of some sort for emergency use. There are two challenges; Dan's article describes one, and the other other, which I think is just as daunting, it deciphering what they cost.
The article is about getting these things to work with network manager. But in my scenario I would want to plug it in to something like my NSLU2 or even my OpenWRT router to provide connectivity for the whole LAN. My NSLU2 isn't going to be running the GUI network manager app: I would need to be able to configure the thing at the "ifconfig" level. I do hope that they aren't putting too much of the support for these things at too high a level.