How did you pay? If it was by credit card contact your card company, explain the situation and do a charge back. Merchants are required to ship your products when they charge your card. It is a violation of every merchant agreement I've seen to charge it and just sit on it.
If it was by check, contact your bank and ask what your options are.
In either case, contact the BBB and see what they can offer you help-wise.
I'd suggest posting the full details on the situation (include a timeline).
If this is a case of fraud, then we can also post the information in the Horror Stories forum here.