I have very little opinion, but this: I have a friend who has a Posterous blog and an LJ. He cross-posts the Posterous to LJ, and also makes LJ-only posts. He's said he'll be with LJ to the end of LJ (mostly because he doesn't want the hassle of maintaining both LJ and DW, and his friends haven't left LJ).

If he does ever decide to give DW a try, I'd like it to be as easy as possible for him.