Other than Gmail and Google Apps, my strongest Google Connection post Reader Social is Blogger. It hosts this post, for example.
I suspect that will take a while, but I'm starting to experiment, starting with an experimental import of tech.kateva. org to WordPress.com. It's not a complete import, draft posts are not included. For example, import dialog shows 3738 Gordon's Tech posts, but that omits 467 draft posts. For Gordon's Notes it shows 5754, so 1277 draft posts are omitted.
Wordpress also supports import of a Blogger Atom export file. I don't know if that will include Drafts, but I may experiment with it.
I can live without the draft posts, especially since I'll still have access to those drafts post-migration. I can plumb those that look interesting and abandon the others.
I don't expect any quick changes. In any case I own the domain kateva.org, so the changeover ought to be relatively invisible to my visitors (though I bet feeds will need to be revised).
If you'd like to inspect the results of the import, here's Gordon's Tech at WordPress.com - http://gordonstech.wordpress.com/. It's pubic but not-indexed with a temporary URL. The import went more smoothly than I'd expected, but it uncovered two surprises, both of which make me keen to move sooner than later ...
- The "New" Blogger has no UI control to move to the earliest post. The "Old" Blogger UI has this.
- Old Blogger doesn't show my 2003 Blog posts, it starts with 2004. WordPress imported them.
 I'll keep my John Gordon profile -- until Google deletes it as a TrueName violation.