I had a good look around your site, all very interesting.
My interest is because I've just finished the design of a new Mega clone and it has 40 GVS headers. My board is not really for beginners but it would still be nice to be able to plug in modules for prototyping.
Have you heard about the Tinkerkit modules?
http://arduino.cc/forum/index.php/topic,1464.0.html
They do apparently exist (I've even seen high quality promo photos) but I've been trying to get information about them for months. I've given up now totally not understanding why it's impossible to get information about an existing product.
Massimo even said they were going to be on sale on the 18th of Oct last year, and nothing happened, then Davide said on sale by christmas...nothing. Go figure.
Rob