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It’s nice to see that Gmail now supports (at least for some accounts) IMAP access. It will make talking to it from the iPhone much nicer — as I mentioned last week, IMAP is just a much better protocol.
It seems that they’re mapping labels to IMAP folders, which is an natural but non-trivial idea, as multiple labels can be assigned to a single email, but AFAIK IMAP doesn’t have the concept of a single email message in multiple folders. Also, the labels are per-conversation, not per-email, so the metaphors don’t line up perfectly. I wonder what happens to conversational labels if one uses IMAP to move a single email across folders…