You can use this form to provide enough information to start the rate quote process.  But keep in mind that in order to provide you with the best initial rate quote it is necessary to have all the critical information.  These include but are not limited to, your income, existing debts (other loans), your credit score, the loan to value, your employment situation and your existing assets  My goal is to get you accurate information the first time. Check out the Perfect Loan article for an example.
As a disclaimer, most of the websites that provide rate quotes without this information assume that your have great credit, enough income to make all your payments comfortably, probably looking to borrower less than $417,000 and you will have a loan to value less than 75%.