I generally shy away from posts that consist primarily of links to other blogs, but, in this case, I want to highlight two ongoing series elsewhere that I've been enjoying and I think deserve greater exposure.
The first is over at Fr Dave's Blood of Prokopius blog, where he's been engaging in a thought experiment I, too, have pondered: the amalgamation of the Holmes Blue Book with David Cook's Expert Rules. It's a very interesting series so far and definitely speaks to me, given my fondness for Holmes.
The second can be found at John Laviolette's The Nine and Thirty Kingdoms, where his "Liber Zero" retro-clone project has really given me a lot of food for thought about the mechanical underpinnings and assumptions of OD&D. And while his recent "Clerics Without Spells" post isn't technically part of the Liber Zero project, it seems to build on some of the insights he's had about OD&D while working on his retro-clone. Plus, it's just a darned cool idea that I kinda wish I'd thought of myself.