I just found this post at 3pointD.com.
One of the many questions/concerns that I get when delivering presentations on Secondlife and learning is the ease of use question. Well, these nifty little improved Heads Up Displays are a great start in the right direction as far as making it easier to get around.
I can envision these being similar to the current "left nav bar" of our current click2death learning offerings. Guiding the user is a great thing for those that need to be guided. These are very cool! Just another step closer to the complete interactive3D version of online learning.