Actually post-feminists are not feminists at all. Post-feminist is an orientation that comes about because people believe that the need for the feminist revolution existed, but has passed. Those who claim to be post-feminist believe that the feminist movement is dated, unnecessary, and becoming embarassingly PC.

A common feminist rebuttal to this position is the statement: "I'll be a post-feminist in the post-patriarchy," implying that this post-patriarchy does not currently exist.

(update) Wow ... this got voted down fast. It *was* actually in the positive ratings for a little while ... :)

Post-feminism is the standard response to any political movement that actually manages to gain some ground. As the people in power find that somebody is gaining power from them, they will automatically, via basic memetic systems, try to destroy it. This is the system of postism, a 90-degree turn about from the orginal idea.
This is used, basically, to sell books. Once an idea is discredeted, more books can be written about the idea, and about the old idea, and about the new idea and how it took over from the old idea. We can then experience the fun that is post-post-feminism. Oh joy. More rubbish which adds nothing to the actual debate, i.e. equality and liberation.