I'm in, though it will have to be MP3 which I can email.

How practicable is the "first come first served" policy? It sounds like the size-limit has already been exeeded, or soon will be - is there pressure on us to rush a submission to you? If so, does that mean not to bother if the quota has been filled? If not, how on earth do you choose? A chronological queue might be the most logical, but does this give the best musical results? (Pull-names-out-of-a-hat would be the most fair, but ditto.) I had wondered about recording something especially for this, but if there's time-pressure I can't.

How will all this work in practice? But it's a brilliant, brilliant idea.