File a complaint with the following organizations:
California Attorney General
NFIC/IFW (National Fraud Information Center/Internet Fraud Watch)
International Web Police
Other Helpful Links:
Hosting Monitor
California Courts - Small Claims Self-Help Center
Class Action Law - Free Legal Information
Finding a Web Host: Lessons Learned About Common Scams and Unreliable Hosts
Los Angeles County Website
Open Directory - Internet Fraud
Google Directory - Internet Fraud
WHOIS (GoDaddy) - Look up the owner of a website
WhitePages.com - Online phone book (can do reverse lookups by address or phone number)