I'm giving a presentation at LA2M on Rich Snippets. Here are my slides and other links.

Links

Rich Snippet Examples: http://wayneeaker.com/rich-snippets

Google Webmaster Tools: https://www.google.com/webmasters/tools 
Google Rich Snippets Testing Tool: http://www.google.com/webmasters/tools/richsnippets 

Google's Rich Snippet Information Page: http://support.google.com/webmasters/bin/answer.py?hl=en&answer=99170
Microdata Information: http://schema.org/
RDFa Information: http://en.wikipedia.org/wiki/RDFa
Microformats Information: http://microformats.org/ 

Google Places: http://www.google.com/places/
Setting Up Verified Author Links: https://plus.google.com/authorship
Wordpress Plugins: http://wordpress.org/extend/plugins/tags/rich-snippets

Drupal modules:
Microdata Module: http://drupal.org/project/microdata
Schema.org Module: http://drupal.org/project/schemaorg
Fivestar Module: http://drupal.org/project/fivestar