Ontem enquanto navegava pelo fórum oficial do arduino descobri isto e acho fantástico.
É uma wi-fi shield e custa 55$ o que me parece um muito bom preço :)
(https://lusorobotica.com/proxy.php?request=http%3A%2F%2Fasynclabs.com%2Fimages%2Fsite%2Fwishield-top.png&hash=d88d357a84c9485816a5d985b86d8c4d970fac62)
(https://lusorobotica.com/proxy.php?request=http%3A%2F%2Fasynclabs.com%2Fimages%2Fsite%2Fwishield10-01.jpg%5Bimg%5D&hash=6edb428d3db2e3063e5b17812ee697f59d4a1ca6)(https://lusorobotica.com/proxy.php?request=http%3A%2F%2Fasynclabs.com%2Fimages%2Fsite%2Fwishield10-02.jpg&hash=a30cb9bac98dde1236a957b6d2494686bf055ae6) (http://asynclabs.com/images/site/wishield10-02.jpg)
(https://lusorobotica.com/proxy.php?request=http%3A%2F%2Fasynclabs.com%2Fimages%2Fsite%2Fwishield10-03.jpg&hash=522fc3dc7c49b86826c725a865eba485fcf4e789)
Têm mais informações aqui: http://asynclabs.com/home (http://asynclabs.com/home)