Ways to get microcontent out of a web page (only tested in Firefox)...

1. With a bookmarklet, based on previous work by Jon Udell. Select a bit of text in the middle of an hReview then click this →extract← bookmarklet.

   Combine this with a few lines added to a user stylesheet (userContent.css):

   
   .hreview:after {
   content: '*extractable*';
   }

   to show when the data is available.
2. With a →Greasemonkey script←. A visible [extract] link should then appear after any hReview fragments.

Hopefully this could be useful in combination with reblg.com at some point.