Matt (Mythmere), author of the new Swords & Wizardry retroclone, has posted a draft of a "Quick Primer for Old School Gaming" article over at Knights and Knaves Alehouse. Even as a first draft, it's a great summary of how "old school roleplaying" is different from current roleplaying. Go read it. Now.
Quick Primer for Old School Gaming
I've already ask Matt is I have put a copy of the final version up here at RetroRoleplaying. I know I'll be including it in my "house rules" copy of Swords & Wizardry as it will be something I want all new players to my campaign to read.