Using WebClient code that came with Arduino and samples downloaded from this forum. Router does not see ethernet shield. Tried DHCP and static, with and without gateway and subnet mask. Tried second ethenet shield, no change. Tried another cable, no change. Tried different router, no change. Routers - Linksys (old) and 2Wire (current.) Firewall settings all open for inside connections, even added MAC as specifically allowed.
Any magic other than plugging the boards together, uploading the code with address changes, and watching the serial monitor? All the board lights blink nicely as if doing something meaningful.