Nope; DW importers are for everyone. They haul in the whole journal with comments (which become OpenID links).

I want everyone to move to DW, or at least post from DW, but that's because I'm greedy. (Steve: I'd be happier with everything at DW, especially if it's all got links to the LJ posts where I'd expect most of the discussions to be. However, if you crosspost, I'm not sure there's an easy way to import with comments; I don't know if that would wind up doubling the posts.)