I’m a bit late to the party but in case you haven’t seen this already there’s some information on the OCS blog about the new ‘Microsoft Certified Master (MCM) Program for Office Communications Server 2007’.

..and on a related note most will already have seen the equivalent ‘ranger’ training for Exchange on You Had Me At EHLO.. here:
Do you have what it takes to become a Microsoft Certified Master? and here:
Microsoft Certified Master (MCM) Program Now Offers 30% Limited Time Discount to Get Trained and Certified

Also check out The Master Blog on Technet @ http://blogs.technet.com/themasterblog/default.aspx