The Jawbone UP is back and well, looks exactly the same. I had the original UP and it failed on me like it did for a lot of people. Even with that knowledge, I plan to get the new UP as I really enjoyed using it when it worked.
The new UP seems to have been tested a lot more and is promised to not have the same issues as the previous version. They also added new colors and some new features like a power nap feature.
The new UP is available starting November 14.