Our company is getting ready to implement our first K2 Blackpearl solutions.  Unfortunately, the process we are automating is highly cross-functional so there are many roles and "trigger points" to manage.  It covers the order forecasting, contract maintenance, order entry, logistics, and service functions for specific types of orders, so not every order goes through, only about 10% of our total order volume.  I have reviewed some of the document on K2 Blackpearl's user and role management, but was hoping to get some feedback from those of you out there with experience on how to best guide our users in breaking up work for their areas.  Some are geography based, some are functional based, etc.  Pretty much all over the map.  I realize that K2 is very flexible, but it seems that the process design is highly dependent on the roles and work assignment methods.  We are a small organization, 300-400 total employees.  Maybe up to 20 K2 roles across all of our automating needs.  However, today the work that is geographic in nature (order processing) may not be in 2-3 months.  I am just tying to put options down on paper for our users to consider.  IT has proposed Active Directory (though we are using a VERY simple implementation of AD), AD groups, Destination Queues, roles in Sharepoint, etc.  Wow, almost too many to choose from!!!  So, if anyone has experiences, good or bad, on the most effective way to manage roles, that would be great.