I signed up for a Jott account today. Jott is a service that lets you send e-mail to yourself (or others) by calling a toll-free number from your cell phone. The email gets run through a speech-to-text translator, so you read it, or click a link in the e-mail to listen to it.
I stumbled across this service today while I was looking for something else. It might come in handy. Part of the whole GTD idea is to have a way to capture thoughts pretty much wherever you are. Jott could be useful for that, if I’ve got my cell phone on me, but no pen & paper.