There probably is a post on this that I didn't notice before on this, But I've not seen one so I'll put it on just in case to maybe help!
A few weeks ago WordPress updated...
Since that update anyone who has made a new blog using WordPress
It will automatically be set to a default:
I would like to block search engines, but allow normal visitors
Where as we want it set to:
I would like my blog to be visible to everyone, including search engines (like Google, Sphere, Technorati) and archivers
Simply log into you're WordPress dashboard, Goto "Settings" Then to "privacy"
And select the correct one.
Hope this helps.