Room is kinda smallish. I'd say about 14' x 14'. It has two racks - a two poster and a four poster. Obviously the four poster holds the UPSes and all the servers. The two poster holds patch panels, a few phone system thingies (I'm not the phone guy), and a couple of Cisco switches.
Almost all our servers are DL360 G3s from Compaq... erm, I mean HP.
We have two servers using iSCSI to get to our NetApp Storage Area Network (SAN). A Microsoft Exchange server and a Microsoft SQL server hosting our ERP.
We run, lets see, 9 servers I think.
1) Exchange
2) OWA
3) SQL
4) Domain controller / backup server (BEX)
5) Terminal Server
6) monitoring server (runs SolarWinds Orion; which I highly recommend)
7) Help desk / IT storage server / intranet via Sharepoint Service 3.0
8) Certificate Authority server
9) Microsoft ISA server for proxying / monitoring our users web surfing