Yup, it works! Just connected my Acer Aspire One running Ubuntu Netbook Remix to mobile broadband with my N900, it really did take 15 seconds. There's a setup wizard that appears the first time you use it, but all you have to do is choose a country and then a service provider. Everything else is totally automatic. And because the N900 has USB charging you don't even have to worry about its battery life, it takes charge from the laptop while being used as a modem. This feature alone is worth a lot to me. Thank you to whoever added this to Ubuntu, it used to be very difficult to get it to run with phone modems but this works perfectly.