Now here's a giggle. The majority of wireless enabled routers contain a pair of serial ports. And they support Open-WRT or DD-WRT. However if your selected router application needs a custom image, then that will require either a Linux box or VM running Linux to make it.
The idea is to connect the Netduino to it either via its serial port to the router, or via Ethernet, if you don't want to use low level communications.
Incidentally Mark not far from where you are happen to be a pair of individuals who travel in what looks like a Police box, please do not feed them but do direct them to the nearest Police station.