Self-help site for people facing debt collection:
http://fair-debt-collection.com/

FTC links on the Fair Debt Collection Practices Act:
http://www.ftc.gov/os/statutes/fdcpajump.htm

FTC links on numerous consumer credit and billing issues:
http://www.ftc.gov/bcp/menu-credit.htm

FTC Staff Opinion Letters on the FDCPA:
http://www.ftc.gov/os/statutes/fdcpa/letters.htm

NACA links for debt collection and consumer topics:
http://www.naca.net/resource.htm

NACA lawyers for debt collection questions:
http://www.naca.net/

NCLC "Guide to Surviving Debt" book:
http://www.consumerlaw.org/publications/guides/surviving_debt.shtml