WiFi hygrometer

Hey everyone,

I'm new to arduino although I have pretty substantial programming experience. What I would like to create is an arduino device which can gather the temperature and humidity and connect to a network with via wireless N.

The shield I found for gathering the temperature and humidity:

or
http://shop.moderndevice.com/products/humidity-and-temperature-sensor

The shield I found for connecting to the wireless N network:

Is there any particular board required to use 2 shields at once? Also can anyone recommend a good online shop for Canadians? most of the shops I find for these parts in in the EU

SuperBabyMethod:
Is there any particular board required to use 2 shields at once?

It is possible to use multiple sheilds with any Arduino, provided they either aren't using the same I/O pins or all of them use any shared I/O pins in a way that doesn't interfere with the other shields.

Shieldlist.org is a good resource checking what pins are used by a specific shields.