We thought we had the market cornered for cupcakes, but I've been in the LA area this weekend and yesterday I went wandering through Old Town Pasadena, where I saw at least three cupcake shops. I didn't sample any so I can't tell you how they compare to Georgetown Cupcake or The Bake Shop, but they're definitely here in numbers.
Frozen yogurt by the ounce is pretty popular out here, too. I wish it was easier to come by near where I live. I think the closest for me (when I can't walk to two shops from my hotel out here) is Green something or Something Green in McLean, but never tried it there. The last two times I drove past I couldn't find a parking space in their lot.