We have plans to begin developing Milestones and Light Scheduling. Milestones will simply be a collection of tasks (or notes you want to add). Say for example you need to finish a feature by June 25th you will be able to create a Milestone and attach tasks to that milestone. Then you can view the milestone to see how far along each task is. This will give a calendar view to a project schedule that can be viewed across a person, project, or client.
It would be great to get early thoughts on what all is needed. This is an area where a lot of value can be added to Intervals, but we have to be careful not to add too much complexity.
Milestones are really a showstopper when planning projects. The modules work as sort of a work around but you can't put dates on them so they aren't really "milestones"....I agree with the previous poster, gantt charts and calendars are pretty useless to me as a project manager if I can't put tasks into meaningful groups (milestones) with due dates.