beginner's Arduino Question

Hello all,

I am trying to develop a prototype for a product and have decided to use the Arduino board. I’d like feedback about which board I should start with, given it’s ultimate feature set. It will consist of:

Two devices that wirelessly communicate with eachother in a home.

One of these devices will communicate data from RFID over a cellular network to a website.

Is there a board which is ideal for a beginner while still being able to incorporate these features?

I’m a beginner as well, but you might start looking at this stuff

http://www.sparkfun.com/products/9607

http://www.sparkfun.com/products/675 or check out related products

and http://www.sparkfun.com/products/11021