I spotted these new extensions out at Retul that could only be from Zipp. They look very much like the existing VukaShift extensions that I reviewed earlier, but they have more rise. The S-bend doesn't terminate in a horizontal shape, but retains some rise. They look great, and will probably help riders who want a bit more stack to the shifters. There's no official word from Zipp at this point, but I'll keep my eyes peeled for more on these babies. They look very production-ready, so I'd expect some news about these soon.
The new VukaShift extension looks very much like the current one, but with a bit more rise. Looks like essentially 20-degrees rise to the shifters.