Nathan Pearson has been doing some very exciting conceptual work on Sakai's user experience. This is part of a larger focus on Sakai's user experience. I'm just starting to get familiar with the 2.5 release and it's amazing when I think about where Sakai was 2 years ago. The work Nathan's leading now is going to cause some jaws to drop next year.

Check out the series of 4 narrated conceptual videos:

Week 4, Week 3, Week 2, Week 1