Here are a few sites on the web that I have found that pertain to sawmills:

Other people that run old circular sawmills:

Bill's Sawmill, Tractors & Engines

Matthias Wandel father's old sawmill

Jim Dunmyer's Sawmill Pictures

Matt's sawmill

Swallow Valley Farm Sawmill

If you are setting up a circular sawmill, here are some excellent resources:

And a forum to ask questions on:

Here are some sites where you can purchase used mills:

And these are new sawmill makers:

 

And some parts manufacturers:

Makers of high quality, state-of-the-art cutting tools.

  Makers of a reusable, UV resistant woven polypropylene fabric. The fabric protects lumber from the sun, wind, rain and dirt while air drying.