I am very interested in macro photography and the numerous methods available to those like me who can't afford to buy those amazing macro lenses. I've started a page dedicated to Close Up Techniques.
Some of these pages are part of the Olympus OM Webring. It is an excellent place to start looking for all of your OM answers.
The Olympus Mailing List and archives are a great resource.
The Unofficial Olympus OM Sales Information File An Excellent source for detailed information on just about every camera body, Zuiko lens, and accessory.
Olympus OM-1(n) & OM-2(n) SLR cameras An in depth look at both of these great cameras.
Unofficial Olympus OM Zuiko Lens Page A detailed look at Zuiko lenses.