Hi,
as far as i know, will be released soon a new Arduino Ethernet board.
It will be all-in-one (not a shield) solution, with POE support.
..very very interesting! XD
Here a image i've done at the ArduinoCamp (www.arduinocamp.com) at 18/06/2011 in Italy, Milan:
Other photos (new Arduino WiFi shield, new Arduino Uno):
https://picasaweb.google.com/pictux/ArduinoCamp2011#5621812536302224690