There are a lot of enigma related websites, here is a list of some of them.

More about sending/receiving messages
Enigma World Code Group
Enigma World Code Group Forum here you can exchange enigma encrypted messages

More about the enigma machine
Crypto Museum, here is also a lot of info about other crypto systems
CIPHER MACHINES AND CRYPTOLOGY

Where are the real ones?
Enigma Display Register
Enigma machines – known locations