Alex..thanks for the reply.. Given that Exchange 2007 IS the current offering from MS AND Bungee is appealing to an enterprise market, it would seem to me to be a given that you'd go after it to show the power of the platform in a real world customer environment. I'd recommend you up it on your priority list - how hard can it be if MS is publishing the interfaces and they have Outlook OWA running on Exchange 2007 already.