I wouldn't bet on it. The problem with most networking solutions is that they require specific firmware as well.
Even GHI is experiencing that. Thus the note: Currently, this module works only with FEZ Spider Main board.. It doesn't work with other gadgeteer mainboards.

Sounds like that.

Upside is that this is real WiFi not a Wifi-Serial bridge.

It's crazy, I bought an external WiFi-Ethernet Bridge with extra 4 ethernet ports and it has webpage for setup, antennas, WEP etc. for ~$50 so in practice it may be better to have an ethernet convertor and lose one SPI then use an external box like this. Only downside is that it takes more space...

What about: $15: http://www.ghielectr...log/product/314 It seems to be exact same thing as "Sytech Designs ZigBee Module". I see $ price instead of UK Pound

Here is another thing I found that works for Fez Spider: http://www.ghielectr...log/product/282 Is there a chance this works with Netuidino Go with small changes? http://www.ghielectr...log/product/282 It's pricy: $99

Looking great. How does this compare to adding a WiFi shield to Shield Base? In general of course not using Shield Base should help preserve a socket, yes? First using your own solution: A) http://forums.netdui...-module-driver/ $34.95 http://forums.netdui...-module-driver/ $19.95 http://www.sparkfun.com/products/9976 " This module is in simple terms, a serial-to-tcp-bridge. It can handle one tcp socket at the same time, but for many applications this is exactly enough! " is fine with me it's just lower performance. Second: http://littlebirdele...uino-802-11-g-n $90 http://www.sparkfun.com/products/9954 $90 http://bit.ly/KNg4zt $51 Thanks