The International Lyme and Associated Diseases Society (ILADS) has been a provider of various guidelines and reference materials for those medical professionals dealing with Lyme and other Tick-borne illnesses.  Their guidelines have been provided on not only ILADS' website but also the federal government's guideline clearinghouse website for many years.  Below are some of the guidelines and resource materials available:

Guidelines for the management of Lyme disease - November 1st, 2006

http://www.ilads.org/files/ILADS_Guidelines.pdf

In early 2004, The International Lyme and Associated Diseases Society (ILADS) released the first evidence-based comprehensive set of Lyme Disease Treatment Guidelines to assist physicians, public health officials and organizations involved in the evaluation and treatment of Lyme disease. The Lyme Disease Association (national) and the California Lyme Disease Association endorsed the Guidelines which were then peer-reviewed and made available to professionals and to the public.

ILADS Lyme Disease Treatment Guidelines Summary

http://www.ilads.org/guidelines_summary.html

Lyme Disease Guideline Comparison (ILADS vs IDSA)

http://www.ilads.org/guidelines_compare.html

Joseph J. Burrascano Jr, MD:

Diagnostic Hints and Treatment Guidelines for Lyme and Other Tick Borne Illnesses
last updated: September, 2005 - http://www.ilads.org/burrascano_0905.html