Freelancing at the moment; best one I've come across (and the one I was talking about) was at @evently. Annoyingly this is the only photo I have of it.
Columns (left to right):
Icebox (roughly prioritised), Business Analysis, Design, Tech Analysis, Backlog, In Development, PM Sign Off, Pull Request, QA, Ready to Deploy, Beta, Live
Rows (top to bottom):
Rapid Response, Marketing, Product
The columns weren't perfect (I think PM Sign Off, Pull Request & QA are in the wrong order - why PR before it's working?), but it was good having a real physical board to stand around every morning.