We use workflow rules to notify team members when a project is approved, when PO's are submitted, when equipment is received, when a deposit is received etc. It would be great to have a tab in the project explorer section that shows a history of the project status by date. When there were design changes, when the PO's had been sent, when all the gear arrived etc. Many of our steps are not linear, so without this the only way to know is to search through notifications.