As dyed-in-the-wool Alan Moore fans, I think that our Moore and O’Neill annotations are the most thorough. Others may be a bit spotty and await your insights via comments.
We are still looking for some partners to collaborate on these annotations. Especially wanted would be folks familiar with gaming (to round out Modded) and with the U.S. Civil War (to round out A More Perfect Union.) If you are interested, email me at linton.joe [at] gmail.com.