I know that you want to know the most posts put up on Boing Boing in one day, right?
You can find out here.
And, you can get an archive file of the first five years of Boing Boing for free. Way less than the $287.99 for the first four seasons of The Sopranos.
how did they do it ?
I tried it sometime back for my blog, it was a cumbersome process
http://labnol.blogspot.com/2004/12/blog-archive-with-all-pictures-and.html