Huh.
So, here's an interesting factoid about the new mobile IMAP interface to Yahoo! Mail.
You can access it from more than just your IMAP supported mobile phone. You can, say, use a mail program like Thunderbird.
You know, if you wanted to do something like that.
Obviously, this is NOT something that i'd bet the Mail team intented. IMAP is expensive, since it can require a constant connection, so don't be surprised if this goes away in the near term if too many folks abuse it. For now, i'd recommend being as gentle to the IMAP servers as you can (e.g. have it check for new mail every 40 minutes or so, don't hit the servers on peak hours, etc.). Give them a chance to see the demand, and roll out the appropriate servers slowly over the next few months.
Remember: their first reaction if this gets too popular is to shut it down.
As predicted, it's too popular. They shut down IMAP and POP services.
Bummer.

