A series of articles on cool things you can do with Project wouldn't be complete without a small amount of attention paid to all that is new in the 2007 edition.
From a usability standpoint, these are some pretty cool new features. Beginning with Project's new ability to undo more than just the very last thing you did. That's right. Project 2007 now has a multi-level undo feature. Bring on the mistakes.
And, let's not forget the new Change Highlighting feature (mentioned briefly, just once, in a related article). This is the feature that highlights any areas of your project that have been updated based on the last change you made. This is perfect for seeing, at a glance, how many other tasks are affected when just one tasks slips by just one day.
Also mentioned in a previous are the Cost Resources. This is a great feature that allows you to assign costs to your project without altering your project scheduling.
Project 2007 has really upped the ante in terms of reports, too. In the "old days" of project reporting, there were the usual suspects: Who Does What When, Task Assignments, Project Costs, etc... But, now, we have Visual Reports that tie into the robustness of programs like Visio and Excel.