From the About page:
Startupping's goal is to help entrepreneurs, to take the mystery out of starting and running an Internet company and to share in the experience.The site includes a weblog, discussion forums for asking questions, and a wiki with some introductory information and sample documents.
I have a couple paragraphs posted on the site today as part of Mark's "Best and Worst Decisions" series.
Update: VentureBeat summarizes startup advice from several entrepreneurs from a Y Combinator Startup School event. Worth reading.
Update: Paul Graham has some good advice in his recent essay, "Why to not not start a startup" (scroll down several paragraphs to where the numbered list starts).