I have..

One webserver.
One machine running diffrent server, such as teamspeak3, minecraft, tf2 etc. etc.
One box that run virtuell servers (test environment ATM)
One NAS (act as backupp)
One fileserver

Future plans..
One single machine who can handle all of the servers in a virtuell environment.

My electric bill is quite high.
I have 100 mbit down and 100 mbit up.

On top of that i have my gaming station and 2 laptops.
For those who are interested in my gaming station...

Two 120hz 24" monitors
Intel i5 2500k quad core (overclocked to 4.1ghz)
16gb high speed ram (overclocked aswell)
SLI gtx560 1gb x 2
Intel OED 120gb ssd
2 tb Western digital mech-drive

Good times.