The list...

According to their website here is the list of Columbus area Paneras:

1. Bexley: E. Broad
2. Blacklick: E. Broad
3. Clintonville
4. Dublin: Perimeter Loop
5. Dublin: Martin Rd
6. Easton
7. Grandview
8. Lancaster
9. Lewis Center
10. Mill Run
11. New Albany
12. Bethel Rd.
13. OSU Campus
14. Polaris
15. Reynoldsburg: Taylor Station
16. Dublin: Tuttle Mall
17. Westerville North
18. Westerville South
19. Upper Arlington

Because I live the closest to the New Albany Panera, I consider it my "home base".