If you haven't been following or reading the blog Ancient Vaults & Eldritch Secrets by the incomparable bat, you have been missing a cornucopia of unique, new, fresh ideas for original edition/retroclone D&D.
Not only does bat provide a new spell or magic item daily, he also provides an amazingly cool "backstory" featuring a cast of Rogues: Chalk (the ever suffering mage), Koram (about as close to Yeagar from Nodwick as you can get...), Gynbaro (a thief - 'nuff said) and Valence (the creepy Spider cleric - who's taught me how to play a Chaotic cleric). Pursued by Stork and Vistus, the Blue Mage, this band of outlaws rips through more spells and items than you can imagine, but the story never gets old. Bat releases all this material under a Creative Commons Non-Commercial Sharealike license, open to all as long as he gets attribution.
I've started going to his site regularly using google "site" searches keyed on various similarities of his posts - this is because he doesn't tag or categorize his site! :) I don't mind one bit, I'd rather he use that creative force and keep on doing what he does, and I'll be the librarian.
So, for your ease of use, here are links to Google Searches of his site to present an "index" of sorts to bat's amazing collection of spells and magic items. I can't guarantee the searches will be 100% accurate, but they get the job done until Bat goes mad, publishes a book on all this stuff and makes off with at least my money.
Level 6 (none yet as of 11/27/09)
Level 8 (none yet as of 11/27/09)
Level 9 (none yet as of 11/27/09)
Level 10 (none yet as of 11/27/09)