Indy Downtown Coffee
Sorry for the late reply. As I'm sure you found, there aren't any. Not really. There's a plethora of Starbucks around the convention center, but that's it. Cafe Patachou in the Simon Building at Capital and Washington has good coffee, but it's really a restaurant/cafe. There's a place at Ohio and Illinois called Cups that I have never been to. But that's a hike.
With a car, you have Henry's on East St (East St & Walnut). My favorite is Calvin Fletcher, on Virginia (at Stevens St).
Indy is fully into the beer scene at the moment. Artisan coffee will be a few more years I think.