Hi Allison,
Contact is a required field, there is no way to do this. Customers need a Main Contact to sync with QuickBooks, so Leads do as well, since they'll eventually (hopefully) be converted to a Customer.
Hope this helps.
- Justin
Justin Henderiks
Technical Sales Specialist
Method Integration Inc.
Toll Free: 1.888.925.6238
Local and overseas: 416.847.0400
Fax: 416.640.6027
E-mail: j.henderiks@method.me