Dark Dungeons is a new retro clone emulating the BECMI ruleset by way of the Rules Cyclopedia. I hadn't heard about this, so I thought I would post about it in case anyone else hadn't either. I downloaded the free .PDF and it looks really cool. I have been looking for a good copy of the Rules Cyclopedia that wasn't prohibitively expensive and this just might scratch the itch I have been having.
The author answers questions about the game in this thread at RPG.net. Also, check out his blog.