[heavymark]

People's willingness to give their information depends on how much they trust the company. Mint is owned by Intuit which is the same company most all of us trust providing all our financial data to for tax purposes each year.

For customers to trust your company you will have to have a lot of financial backing and support of big names in the industry. And when Mint first launched people were a little less concerned about giving up data. Now a days people are much more aware of the implications so you would be fighting an uphill battle.