Credit card issuer Advanta entered into a partnership with Kiva. The initiative is called KivaB4BProject and Advanta will match the loans made by business card holders with up to 200 US$ per card. Card holders simply select a business owner to sponsor through Kiva and make a grant using their Advanta Business Card. Advanta matches that grant, dollar for dollar, and Kiva distributes the total resulting funds.
The loans funded by this project can be seen on this Kiva lender page. Already contributed to more than 500 loans.