I’m a friend of getting good inspiration from best practices, but this goes way too far.
I dunno, 37signals set the standard, and did a pretty good job of it. Anyone creating a projekt management/sharing thing in the net is going to have a hard time to do it as good or better *and* invent a structure which is wildly different. Fred at WeBreakStuff told me he hates BaseCamp, and his relatively new BaseCamp replacement, GoPlan, is well-designed, but also not wildly different.
Have a look: http://goplan.info/screenshots/dashboard.gif
Same basic structure with little improvements.