CS Harris over on her blog has a lot more on the topic of brancing. CS (Candice) is also in my writing group and it was she who brought the topic to our attention Monday night. She's done a lot more thinking about it than I have so check out her posts on the subject.
By the way, in my thoughts on "branding," I wasn't sure whether I should include a "series" as an example. The reason is, to me, branding is more about subject matter, plot devices, and so on than it is about character. I can see how a series character could also become a brand, but I don't think it necessarily needs to be.