e-Bay seller kbellenterprises has a Wiznet 5100 ethernet shield for the Arduino for just $11.49 with free shipping. And, it ships from Missouri (fast). I have not used this shield, but it’s a great price if it works:
This seller also has various Arduino clones (a Leonardo clone for $12.75 and a Leonardo mini for $9.99) with free shipping as well.
Pingback: Arduino Ethernet and multiple socket server connections | Sub-Etha Software
Pingback: Configuring the TP-LINK TL-WR702N nano router for Arduino | Sub-Etha Software