tedster - 1:30 am on Aug 10, 2011 (gmt 0)

We've got a more recent thread on the same topic - see Mega Sitelinks - everybody can see big sitelinks now [webmasterworld.com] It looks like this is mostly triggered by navigational queries and something in Google's algorithm. It's clearly not microformats.

In order not to have two threads on the same topic, we're locking this one and taking the discussion over to the more recent thread [webmasterworld.com]