Here we should post our configuration:
Dell Poweredge 2950III (Dual Xeon 2,8Ghz, 16GB, ...)
Debian 5.0 (x64)
Nagios 3.2 (just updated)
NagiosPlugins 1.4.13
NDOUtils 1.4b8
Nagios Process Business View 0.9.3
Impact Plugin for NagiosPB
SNMP NagTrap 0.1.3
SNMPTT 1.2
Pnp4Nagios in Bulk Mode
NagVis 1.3rc1
OTRS 2.4.3 (TicketSystem)
and NConf 1.2.5

We monitor and visualize ~300 Hosts (Windows and Linux Servers, Windows Clients, VPNs, >25 SNMP Switch, Most Clients, Cash-Desks, Website, Internet-Connect,....) with about 2000 Services (ICMP, SNMP, SMTP, Exchange, SQL-Server, Oracle,....)

Strolz Johann