This posting on executivembaprograms.org has 50 links to other sites that provide information related to establishing and running a non-profit organization. However, don't forget that a knowledge attorney and CPA can be the most valuable resources of all.
This report on msnbc.msn.com discusses GuideStar's statement that 500,000 non-profit organizations could lose their tax-exempt status in May 2010. Non-profits with annual receipts of no more than $25,000 need file only a short informational return with the IRS - Form 990. Failure to do so for three consecutive years will cause revocation of non-profit status.