Show all comments in workbook, not just on active sheet
I'm liking the new threaded comments feature as this allows us to track issues in models and resolve them before release. As a reviewer, however, it would be good to be able to see all comments (i.e. issues) in the workbook, rather than just the ones on the active sheet.
Also, it might be useful to be able to assign (multiple?) user-defined categories to comments (for example 'urgent', 'completed', 'UI', 'performance') and be able to filter the list for these items.