There is a new limited edition of the U2 without the GMT function and without the red accents. It comes with a army green silicone strap as well as a "Bond-style" Zulu strap.
The watch will be only available in the online shop of the german Chronos watch magazine (hence the "C" in the name). Only 50 pieces will be made. Price is 2'760 Euros and apparently you need to have a german delivery adress to buy one.
Pics can be found here:
Sinn U2 C
What do you think about this one? IMHO, it looks great!
Edit: Apparently the link above doesn't work for everybody. Here are two additional links with infos about the watch (including pics): one is to Roger Ruegger's dive watch blog and the other one to the german Sinn website.
But unfortunately, under the first link I posted you find the best pics.