Arduino have taken the tiny wraps off of the official ethernet shield for their open-source prototyping platform, which adds network connectivity to the device. Based… ...

Electronica: Arduino makes single-pair Ethernet accessible, and RS485 too Arduino announced a single-pair Ethernet adapter board for its Uno R4 single-board microcontroller at Electronica this morning ...

The problem with using it along with Arduino-based gadgets is that you then need to use something like an Ethernet shield to provide the network connection.

[Andy] needed a cheap Internet connection between a data-gathering Arduino and his home server. An Ethernet shield would suffice, but he couldn’t run CAT5 to the Arduino’s location. Wir… ...

There is also a “Cloud Flash” feature to program networked-enabled devices like the Arduino Ethernet or Arduino & Ethernet Shield.