For agile shops, it would be great to be able to estimate in story points as well as hours. The reason for this is that you tend to estimate the project backlog in points (this is a course, developer-independent estimate) and the sprint backlog in hours (this is a finer-grained, developer-dependent estimate).
I would like to be able to see burn down charts, graphs over time and summaries in both points and hours. I would also like to see estimated and actual hours against points, as this tells us how good our estimates are.