1) I would also like to know when we can expect a proper cross-browser/OS experience. Firefox and Safari have plenty of market share as does OS X and Linux, epsecially in an academic environment such as ours. OWA light is just not good enough.
2) When will there be a serious migration tools for 2007, that perform fast for large numbers of large mailboxes, support things like IMAP PROXYAUTH and can import mbox formats. It would also be good to have outlook profile, calendar, contacts and other migration tools.
3) When will there be a proper Exchange client for Mac OS X, not Entourage. 2008 still isnt "Outlook", people desperately want feature parity and this has been going on for years and years. I know this is more "Office" than "Exchange" but it's all Microsoft!