JKM@SA: What is this field for?
Contact Type is defined by QuickBooks and is not something we set. It can either be Contact, AltContact or Empty. When Empty it's a Method only contact, when either Contact or AltContact it means they live inside both Method and Quickbooks.
JKM@SA: Is there a field in contacts where we can identify the affiliation of the contact to the customer? i.e. spouse, employee, neighbor, etc?
Not by default but you can edit the Customer table to add in an affiliation field
Hopes this helps.
~C