Chase is calling their new business card "Ink?" Yikes!
Here is a thread with some general "maximize" info across personal and business cards:
http://www.flyertalk.com/forum/other...-earnings.html
If you specifically want a business card, and only one, there aren't many great cash options out there. There are category accelerators, like Citi's AT&T business card (5X and 3X by category, 1X all other) and discount accelerators, like AX Open cards (and cash acceleration on SimplyCash). An AX SimplyCash may get you closest, but depending on your vendor mix, you may have acceptance issues.
Good luck and let us know if you switch, and to which product!