First: I dislike ads and so will not be adding them to PMN in the foreseeable future (they would annoy you and wouldn't make me much money).
However! I have, as a result of my perpetual sales mindset, been considering adding other monetizing features to the blog (such as a $0.99 – $1.99 e-book or two with exclusive content, or a Zazzle-type storefront). I'm not sure how much you need Shakespeare "O Snappe" t-shirts or PMN coffee mugs, buttons, and mousepads, but if there's demand, I'm all about the supply.
Second: There will be significant upgrades to the website in the first half of 2011. Stay tuned!
Third: There will be another call for guest posts in the near future. Stay even more tuned!
Fourth: There are now 365 PMN posts—one for every day of the year! Now that I think of it, maybe I should make a PMN page-a-day calendar...
Fourth: Any theories, ideas, suggestions, thoughts, vitriol, praise, articles of propoganda, and/or grand revelations on the above topics (or any topics, really) should go in the comments. Make haste! It's almost THE FUTURE!