So the things I’d look for immediately from a Google Docs to blog publishing method is the ability to use microformats to indicate a Title or Headline, assign the post to a category and any other microformats I can think of and the my blog supports.
Perhaps there’s a way to do this, but I haven’t figured it out yet. The things you do get are spell checking, and all the nice word processing features that help in writing and editing a piece of text.
And there are things like simple blockquoting that could make formatting much easier.
Another nice feature is the ability to edit the HTML. A preliminary look at the HTML shows a fairly reasonable approach to mark up. The blockquotes are divs and inline styles. But the paragraphs aren’t “p” tags, they’re “br” tags.