G has introduced a new method for siteLinks. An excerpt is shown below: "You may be familiar with sitelinks, the links that show up underneath the first search result and which lead to specific pages deeper within the site. Until now, sitelinks have only ever appeared on the first search result, and so at most one site could have sitelinks per query. We're now launching an expansion of sitelinks: a single row of links can now appear for results that didn't show sitelinks before, even for results that aren't in the first position. This means multiple results on one query can now have sitelinks. Up to four sitelinks can show up right above the page URL, instead of the usual two columns below the URL of the first result. Here's an example where the first three results each have one-line sitelinks: For further reading, see HERE
Theres a great post by Patrick from blogstorm (mad4) on here about optimising these site links http://www.blogstorm.co.uk/start-optimising-your-one-line-sitelinks/