After playing with Arduino for a while, I wanted to connect one to the Internet for a little project. Now you can buy shields for that, but they are quite expensive (like 40$). So I decide to look for alternatives and after a while I found 10$ ENC28J60 Ethernet modules on eBay. While they are not as full fetched as the official (Wiznet based) shield, they are certainly a lot cheaper.
Via Axel, Jim Lerman