A rewrite? In the forest of retroclones, I think you want Swords & Wizardry.
Swords & Wizardry Core Rules (pdf) by Matthew Finch in Games
About a year ago I found a pdf of a re-write of the original D&D. However, I have lost the pdf somewhere. Any ideas on where I can find and download one again?
Ed
i have pdfs of all the 1e/2e material but i don't think he is looking for that.
There is a pdf floating around that basically is the 1e phb pdf but has a lot of stuff changed.
So it is kind of like a retro clone, but instead of making a whole new pdf/book they just changed stuff in the 1e pdf.