Development and Version control

All time, working and programming for Unix, i had used CVS for version control. But due some errors in working in xml and, other restrictions, i try to switch to another VC system.
Now i hardly try to use GNU Arch for distributed development. I start to extend current version of DansGuardian and use GNU Arch for this. And it's very good product, when developers are distributed around the world ;-) But now i think about , how to use GNU Arch for collaborative development, in our firm, and how to switch to it from CVS, without studying users for long time.

C++ development

last time i close working with C++, after many time programming in functional languages. And after some review, i found many libraries, that enable me to use functional style of programming for C++.
Now i try to decide, which library must i use - FC++ or Functional from boost ;-)
And also exists Intelib , with that i can program in C++, as in Lisp.