Currently, Wagn sites in search results don't show anything other than the site name and the URL.
http://probablyinteractive.com/2008/10/20/Ruby-Rails-and-Google%20Sitemaps.html
Ideally we'd use Wagn cards (of course) for any site-specific configuration.
Probably part of this is to add *description and *keyword cards, which can be used for meta tags in head.
+discussed in support tickets
+relevant user stories