Like you, I find the lack of activity on these forums concerning.... I hope Netduino is not dead, I really like the platform!
Huh, i have worked over 2 years with NetDuino Plus. But, guys, what about Raspberry PI ? I've tested, and , you will not believe, much better, easier and a good support from many forums. So I decided with a heavy heart that I give NetDuino retire. I progranmed in BASIC. I'm now working with a very good B4J (http://www.b4x.com/b4j.html). My life immediately got easier, hehehe.