Maybe I'm stuck in the eProject 5.0 mentality, but I was trying to set the user's start page to the project that they had been invited to. This would give them one landing page from which they could view basic project information (profile, status, next 5 milestones), and then access additional information (documents, calendar, etc).
So when the person logs in, they would be shown the project profile, status, next 5 milestones, etc. They could then select from the menu options down the left side to view Calendar, Documents, Tasks, etc.
Is this configuration possible?