Seeing as you're settled on the Netduino platform, I'd suggest you ask either on the Netduino forums or in their live chat room http://forums.netduino.com/index.php?/chat/
Alternately, https://electronics.stackexchange.com/ might yield better answers than stackoverflow.
Note that in the forum post you link to for the shield base, they indicate that only one shield base is supported per Netduino (at the time of writing, this may have changed):
Another noob question: How many shield bases can one connect to a NGO? Is more than 1 a viable option?
Currently just one. But with the final release I'm hoping on more :)