Introducing a new model while tweaking and refining the existing models will definitely be a "walk and chew bubble gum" thing. If Zero has all hands busy getting the 2012 bikes refined, then maybe they can't afford the development staff or attention to bring out an all-new bike.
Do they have room to reduce prices on the 2012 bikes? Yes, though perhaps not as much as I imagine. Assuming Brammo can bring their $17k Empulse to market next year, the existing Zero is only slightly less expensive, significantly slower, lower range, and significantly less quick to charge. I think they'll have a hard time selling the Zero @ $14k, even with a faster charger.
@ EB: I don't think Zero will scrap the existing designs (Zero is pretty competitive already against the E+), but probably will tweak and refine them.
Will they bring out an all-new design (my speculative SS)? I think they'd like to.
3 years ago Zero was reportedly considering a SS sportbike with fairings, based on the existing 3.4 kWh S. They have staff members (LFP, KK) that are very interested in performance. At Refuel 2011 they tested a prototype bike which I speculate was the powertrain test bike for the 2012 bikes. At Refuel 2012 they tested a prototype MX with dual Agni motors. I think this is a powertrain test bike for a SS bike: makes no sense to test a MX at a racetrack instead of a motocross playground ....... unless you're not really testing the MX, you're testing the dual Agni powertrain.
So now it's a question of whether they can bring out a new design while also price-cutting and tweaking the existing designs. They can reuse the existing battery modules, but they'll have to build a new, slightly larger frame (that can perhaps fit 3-4 ZF3 modules), source fairings, get a motor controller online, test and debug the dual Agni motor ..
If they haven't cut their development staff, then they've got to be working on something - and I don't think throwing a new charger in the 2012 bikes is going to keep them busy. I think the SS is the most likely candidate, but who knows if we'll see it EICMA 2012 (or ever).
Also, regarding an expensive 20 miles - a single 2.6 kWh ZF3 module bumps the ZF6 (2 modules) from $11500 to $14000 (ZF9, 3 modules). Zero and Brammo both price their marginal battery around $1000/kWh, 1 kWh is good for about 10 miles IME. So that's about what you pay either from Brammo or Zero ATM.