I’ve been thinking for a while now on which one to use and I still haven’t decided. It seems that RedHat after RHEL5 will be pushing FDS but it’s not clear if it will be a $$$ addon or not. In my testing both fullfil my requirements so it’s not clear which one is better for my needs. Building FDS from the sources is possible now so vendor lockin isn’t a problem but the community seems small at the moment, although if it gets added to fedora things might start moving fast.
I am trying to decide on which language/framework to use for the frontend of a “hosts” database here at work. It seems that if I want good integration with kerberos/ldap only java (maybe Zope?) is the only choise. Rails/TurboGears/Django fail short in this area from what I can see.