Ethernet Shield
The Arduino team has recently released an Official Ethernet Shield. I was having trouble with my Adafruit XPort shield as you have to configure the XPort and it takes a lot of code to get it going. This Arduino stuff is supposed to be easy and fun, and the XPort is not. The official ethernet shield though is wonderful. You have to upgrade the ide to version 12 to get the ethernet library. The shield uses SPI to communicate (the library takes care of this) so you only loose digital pins 11, 12 and 13. It also brings all of your pins up in the same location, so that you can mount another shield on top.
The official Ethernet Shield is also ~$40 so its not a bad price. NKC has them in the states.
I plugged in a board with 3 linear pot’s and edited the basic web server sketch to be a little more to my liking.
When I browsed to the Arduino on port 80, this was displayed
My code is here: http://dailyduino.com/code/ethernetshield/webserver.pde
Writing a sketch for the Ethernet Shield is very easy, change the ip address, maybe the subnet mask, and its pretty easy.