Some interesting stats about the relative usages rates on distributions in the Linux server space. SUSE, Fedora or Debian for sys admins: A closer look:
Interestingly, Debian accounted for 44.6% of the Linux systems deployed while SUSE had 11.4% of the systems deployed. Fedora and Red Hat legacy distributions accounted for 9.2%. The later surprised me.
As those experienced with Debian would expect:
Overwhelmingly, system administrators preferred apt-get for adding, removing and updating their servers. We also discovered that system admins added ports of apt-get to Fedora and SUSE. So much for yast -i. The preferred Debian administration utility drove people who used the non-commercial distributions to Debian.
Also with a link to an interesting php ldap admin tool: GOsa.