CMS Made Simple Forums

Current situation
Although slowly the front End User is evolving as the central point, there are many non integrated modules for functionality within CMS Made Simple.

For instance I want to define functionality for persons:
• That have access to the intranet (Front end users, custom content)
• That receive multiple newsletters (NMS)
• That have access to a closed forum (Forum, already uses FEU)
• etc

Problem
The modules are not very tightly integrated.
So to make one integrated solution for a customer requires additional work

Solution
I would like to define a central person database (Front end user) that can function as the anchor point to which all additional functionality can be related.

For this central person database, I want to be able to define multiple variables:
• Address
• Telephone
• Etc

Related to this central person database I would like to adjust:
• Forum
• NMS

Questions
• Who can make this functionality?
• In a way that it conforms to the core? (If FEU is part of the core)