Last night I managed to wrangle a couple Nerf Rebelle Sweet Revenge kits out of the (very nice and helpful) staff at my local Target.
The Target website lists them as being in stock basically everywhere, but at least at my local store, they're not on the shelves yet (the employees expect them to be stocked with the test of the Nerf blasters) and the store has them marked as discontinued. So your mileage may vary, but when I asked, the saleslady went and brought out all the kits they had, sold me a couple and stocked the rest on the shelves.
The gun is pretty sweet. Basically the same as the hammershot, but a little more streamlined and a lot less orange. The holster actually looks like it could be used in a larp, but I haven't tested it extensively. I'm a bit sad to have to paint over the wing design though; the gun is pretty.
All and all, a very respectable attempt on Nerf's part to broaden their market to the other half of the human race.