We have now used N8 with datasyncronizer for few weeks without any
issues. Any feedback from other users?

I was just curious cause it was not under supported devices under the
wiki (just addeded it there thou).

Also page: http://www.mailforexchange.com/FAQ.asp#10
says that: "All Nokia E-Series devices and all Nokia N-Series devices
support Mail For Exchange". Is there limitation on datasyncronizer
itself that reduces the model of phones you can use with it?

In common if you find some device what is works fine with the DS -
please update the wiki.