Actually I am not saying that. However, it appears that a lot of Exchange Admin people are saying that is not what they want to support (for whatever reason). With that said, I believe that besides EMAIL; Contacts, Calendar, and Task Syncing are very important. IMAP would only give you EMAIL. Also, you would have to also support IMAP Push which Yahoo is currently supporting.
My point is why fight it. Would it not be better to just give full support to Exchange and/or Blackberry Connect so the Business Community would embrace it now. Also, remember that there other sucurity concerns besides IMAP SSL. Like lost PDA's being cleared of Corporate information if needed over the air.
Of course they could be going off in some other direction. Maybe you will be able to get Over the Air SYNC of Mail, Calendar, Contacts, Tasks, Notes from another to be anounced server to compete with Exchange and Blackberry. I know MS is also supporting this with Windows Live for the non-business user (or maybe small business user). I think they could do something like this as well. As you know they already have Yahoo Push Email. Maybe Yahoo can get busy and support the other options with a backend to Exchange and Blackberry. However, not counting on this since Yahoo does not seem to be doing that good of job at just doing the Push Email part.
Again, I started this topic to see if anybody could shed more light on the comments made about Corporate Email. Sounds like you are saying that they are talking about what is already available which is IMAP. Is that what you are saying?