Mac OSX and Microsoft Exchange Server

Given that Apple have declared that iPhone OSX 2.0 will include full support for Microsoft Exchange server does anything else think (or hope like me) that any development work in this area might also be delivered to Mac OSX 10.5?

Although you can work with Exchange Server through LDAP for the Address Book and through Mail.app for email there is no calendar integration in 10.5.

Apple, how about rolling the calendar integration promised for the iPhone into Mac OSX? You'd sell a lot more Macs in the enterprise if OSX worked seamlessly with Exchange Server.