Do Zombies evolve?

[Elmer J.]

I stumbled across this in one search or another on IMdb, and I think it looks pretty cool.
http://www.imdb.com/title/tt0418819/...c=1;ft=20;fm=1
It is basically your typical zombie flick, except that the zombies are apparently 'evolving.'
I've always wondered what happens after Zombies infect every living thing on the planet.
Would they just stumble around eating each other?
Or would their brains start to redevelop above their basic instincts, eventually evolving tool use, thought, customs and culture.
It occurs to me that, even though it starts messy, a zombie outbreak may be what leads to a utopia where no one ever dies.

I once came upon a reference I didn't get in another thread about reforming zombies.
I'm not sure if this is what they meant, but I've had the idea of a completely functional member of society, who is also dead, stuck in my head ever since I read that.
Maybe he(or she) could even help kill zombies. A Zombie zombie killer, that would be great.
Anyway, i was wondering what your theories are on what would happen in a post-zombie takeover world, and your thoughts on this movie.