Google rich snippets, custom content type
This can be accomplished by printing the values you're self instead of letting fivestar do the default rendering.

Here's an example:

$results = fivestar_get_votes('node', $node-&gt;nid, 'tag');
//$results now has everything you need to do microformats


The results will have the average and counts. You can print those variables where ever you like. Also note you probably should disabling the text display on the fivestar widget.

There is also an issue over at http://drupal.org/node/901260.