Interesting. Looks more mac specific than I was thinking.<p>My musings on interesting areas:<p>* I don't care about IMAP/POP/all that stuff. Mail comes in via SMTP, goes out via SMTP.<p>* Messages go straight into postgres<p>* There's gold in them thar messages headers - there's a lot of structure hidden in there that gets ignored, it must 
be possible to do <i>something</i> interesting.<p>* GTD motivated one-message-at-a-time, file/reply/mark to reply later.<p>* There must be something interesting you can do with automatic email classification.<p>* Only client is webmail.<p>* Unashamed focus on people who need to manage 500 messages a day.