Google does not always display all your backlinks. Visit the following  sites to see who's linking to your blog.

PopUri  is a free web tool to check at-a-glance the link popularity of any site based on its ranking.

urlmetrix.com lets you check your web popularity, rankings and more.

Reveal incoming links to your blog with Google Blog Search.

IceRocket is another blog search engine, like Google Blog Search where you can check your incoming links.

Google Webmaster Tools, also shows the number of incoming links to your blog.