Hi Daniel (dgelman),
Welcome to the Netduino community! I was browsing through some posts and noticed your questions and am sorry that it appears to have been left unanswered for some time now. This generally isn't the norm and I can only assume it got lost amongst a bunch of other posts. Hopefully I can shed some light on your questions.
1) What is the maximum current source/draw from the Vin pin? As I understand Arduino is limited to 1A, but I was wondering about NP2.
Here's a pinout diagram for the Netduino Plus 2 which also lists the maximum current draw for each pin and the entire board. If you have any other questions, post them here and I'll try my best to find the answers for you.
Netduino Plus 2 Pinout - http://forums.netdui...eference-sheet/
2) What is the maximum PWM frequency that maybe achieved on the NP2?
Oh, this is a good question, and I recall finding some conflicting and confusing information about it a while back when I was wondering the same. Here are a couple posts I wrote regarding the maximum and minimum PWM frequencies that should clear things up.
Maximum PWM Frequency - http://forums.netdui...quency/?p=44118
Minimum PWM Frequency and Period - http://forums.netdui...duino/?p=43946
Here's an example on how the PWM works using the Netduino Go and Shield Base module. With some very minor changes you can alter the code to work on your Netduino Plus 2. http://forums.netdui...-potentiometer/
Again, if you have any questions please feel free to post them here and we'll do our best to answer them.