Most awesome feature of the whole OSR community is fact that it's constantly releasing tons of stuff - games, modules, supplements, both paid and free. However, I noticed that almost all these products are written in very "modern" style - 100% content, no fluff and - most importantly - absolute lack of author's commentary.
I want more games and supplements with tons of author's comments. Products containing stuff like "that's why I used this rule", "you can use it this way or that way", "I was inspired by this or that". I don't encourage anyone to use Gygaxian twisted style but that's something pretty easy to do.