Free download of the Core Rules is HERE. (direct download link)
Double-Barreled post from Wayne Rossi at his blog: Semper Initiativus Unum. First there's his view on what Swords & Wizardry is, and why he changed his mind to like that approach. He has definitely hit on an interesting approach by viewing S&W as a "distillation" rather than a "clone." I still think "clone" is the right term, but it's definitely a point of discussion in the community about how closely Swords & Wizardry emulates the original rules, whether close emulation is even possible with the original Dungeons & Dragons books, and whether close emulation is desirable (which, for my part, I think it is).
Wayne's other post is a new monster. Grug Beetles are an oily vermin to add to the dungeon....
Another blogger providing gaming material is the formidable Rob Conley, author of Majestic Wilderlands (yes, that's the Judges Guild Wilderlands, and Rob wrote it with a license from them). Majestic Wilderlands is specifically written for Swords & Wizardry, and Rob is also the author of Blackmarsh, which is a system-neutral and FREE mini-campaign for hex crawling. Today, Rob has put up Bodenburg Castle, and it's worth taking a look at! The link to the Wilderlands, above, points to a whole slew of materials for Swords & Wizardry (or system-neutral with S&W in mind).