You could get a thingy from a mobile phone company that you plug into a computer (usually a laptop) and lets you talk to the internet over the mobile phone network.
Just been issued one of these with a shiny new laptop by my new job
Ian you lucky,lucky,lucky,lucky,lucky,lucky.bar steward you,and a job as well.
There's a Twitter Flash app, but most of the times ir just seems to display a black box, so I've dumped it for the moment for a simpler text version.
I think Adblock considers Twitter flash app to be an ad which is why I couldn't see it. Text works fine!