I know that there's been talk about the Official Arduino Wifi shield in the past - it was announced almost a year ago:
However I noticed today that the shield has appeared on the Arduino website's /Hardware list. I'm pretty sure it wasn't there a few days ago, which leads me to think that it may be near(er) to being made available.
I for one would love to get my hands on one and I'm sure you guys would to. Does anyone know anything more about it, or is it me just being stupid...