Blogger + Google Docs

The allegation is that users of Google Docs will be able to post documents to Blogger from within the GDocs interface. Well, everyone else seems to be able to, but I haven't had any luck whatsoever. When I click the "Post to blog" link, the following error message pops up:

"http://beta.blogger.com/api/rpc2?abc=xyz does not appear to be a valid url"

I know my settings are correct, because when I click the "Test" button, a mess pops up telling me that I am able to post to my blog from Writely (an interesting use of the legacy name, that). So even though I am able to post from Writely, I am, in fact, not allowed.

For the time being, I'm stuck using Blogger to post to my blog.