For the last few months, I have been exploring the vibrant OSR scene. I am still involved with 4E D&D, but I have been less fired up about it since they announced the new products for 2010. It feels like WotC has successfully launched the system, and so for this year they are working on expanding their base of players, and going back and doing some polishing. I just got the Plane Above that looks like a good read, and I am sure I will pick up the Dark Sun books, but otherwise 4E is not going to be my main focus for a while.
So instead I have been looking at Swords & Wizardry, Labyrinth Lord, as well as OSRIC and 1E AD&D scene. The key philosophy that the old idiosyncratic rules systems don't need 'fixing' or 'expanding upon' is kind of interesting. (Here is the primer for OSR gaming that explains it better then I can.)
I think for me the draw is the fact that it keeps the focus on the game session as a social interaction, with "rules" more akin to social rules at a party. the other draw are the freer OGL type rules that allow creating supplements that can be sold on Lulu.
In any case, I will callout what system a posting is referring to going forward.