If marketing is the attempt of getting the word out to a larger audience then this news letter is a step in the right direction.
I would like to see a sign-up form (or links to) for this letter on both the main NS web sites / Wiki and any future social media posting.
I also think that the news letter shoudn't be very technical but should include any new developments, new features and general information about NS. As well as links to any 3rd party reviews and discussions about NS.
I think that you have striked a good balance of general information and more technical information within this letter, also the injection of humor (ie. the paragraph that includes "Being alone sucks") is a good and fun idea (but shouldn't be overused or takeaway from the main subjects / message).
Also, I like the idea of promoting the community that resides within this forum and think if you can further promote the idea of free discussions that allows the community to give input and help to mould the future of the NS platform within the news letter, then this would encourage more people to sign-up and contribute to NS.