Out of curiosity, why not write DocBook directly using a WYSIWYM editor -- for example OxygenXML? Edit: I don't think it's worth using for blog posts and such, but for anything that you plan to publish -- papers and books -- it works very well.
Do you review your own changes, or someone else's? Asking because the former is unusual, but the latter works much better with OxygenXML's built-in change tracking. It's fantastic for working with editors (in combination with, say, Subversion).
Both. Also, I have sometimes a doc edited on google docs, then copied over to local file and formatted in asciidoc. After that we put it back to the google doc in asciidoc markup, and subsequent comparison and merging becomes a way lot simpler.
