I guess this is more of a comment than a question. I have a Yahoo small business account and I downloaded Zimbra Desktop to evaluate as a replacement for MS Outlook. While the IMAP functionality of the Zimbra-Yahoo bizmail link-up was great, I was surprised that I could not synch the Calendar, Notes and Tasks with my on-line Yahoo bizmial using Zimbra Desktop, which is something that I can do with MS Outlook using Yahoo's autosync. There is not even an easy way to export my Yahoo Calendar, Notes ot Tasks and import them into Zimbra.
I find this lack of functionality to be both surprising and a bit frustrating. I would think that having "IMAP" type functionality for Yahoo bizmail's Calendar, Notes and Tasks would provide Yahoo a highly desirable competitive advantage.