I originally posted this at http://www.318.com/TechJournal
Article about 318 on Apple.com, focusing on a project we did integrating Kerio to replace Microsoft Exchange, giving our client the ability to centralize all of their server assets into an Open Directory environment while still using MAPI to provide groupware components to their user base, have handheld devices that sync with their Calendar/Mail/Contacts and of course, use the standard Exchange features of mail, etc. Good stuff:
http://consultants.apple.com/at_a_glance/318inc/