I came up with the idea while reading Make Something Wonderful. I thought it was so interesting that Steve Jobs would email himself, and I wondered what it might be like to "email" yourself fragments and thoughts and have them naturally assemble into more complete pieces of work over time.
Me-mail is the version I think represents the idea well. You send yourself a fragment, and fragments on the same subject form a thread. Over time, threads grow into finished pieces, and finished pieces leave the app for wherever you keep your work.
Nothing actually gets emailed. Sending yourself a note is the metaphor.