I know that Jive has been on the fence with Calendaring, but this is one that could be a logical improvement/enhancement to the Project Calendaring experience.  As projects grow, and people look to separate phases/sprints into their smaller projects, it may be beneficial to have a Project Calendar Widget that is capable of grouping all projects in that Space into a single view.  Similar ot iCal, but less flexible.  Ability to see which projects are visible, click on a project to hide tasks/checkpoints from a specific project.

This may go into a larger, what to do with Calendaring for the internal deployments; as I feel that Jotlet is a great ground-up alternative...as well as the other plugins such as google etc.

Other features that would benefit from updates to Tasks/Checkpoints could be the following:

• Filtered Project(s) Calendar View (filter by Tags, completed tasks, tasks behind schedule, tasks less than 50% complete)

This is a 1st stab, but I'm sure common sense will fill-in the rest. =)  Thoughts?