Zu den zufriedenen FAI-Usern gehören u.a.:

BLB Karlsruhe 60+Hosts
Brown University, Dep. of Computer Science, 300+ hosts
Danmarks Meteorologiske Institut, 85+ hosts
DESY 60+Hosts
Deutsches Elektronen-Synchrotron 60+Hosts
Electricité de France (EDF), France, 200 hosts
Ewetel, ISP und Telco 65+Hosts at 3 Locations
ETH Zürich, Computer-aided chemistry, cluster, 45 dual Athlon nodes, 15 single nodes
fms-computer.com, Germany, 200-300+hosts in several Clusters for Customers
France Telecom
FU Berlin, Physics Department 139+ hosts
HBT 60+
High Performance Computing Center North    HPC2N,
2 clusters listed in top500.org, 192 dual Opteron, 120 dual Athlon
Host Europe 250 Hosts
IFW Desden, Germany 100+ Hosts
Lycos Europe, search engine, 850+Hosts
MIT Computer science research lab, 200 hosts
MPI für Meteorologie 60+Hosts
Netcologne 60+Hosts
Prionet 60+Hosts
Universität Augsburg, Physics Department 80+Hosts
Universität Bochum
Universität Erlangen
Universität Köln
Universität Saarbrücken
Universität Paderborn, Mathematics Department 120+Clients and Servers
University of New Orleans, 72 node Beowulf cluster
University of West Bohemia, Czech Republic, 180+
ZEDAT FU-Berlin 60+Hosts