I think wordpress should have a proper backup system so that if you get hacked or your blog has a problem you can just upload the file and it will be EXACTLY the same as before, if you can already do this please tell me
First, you explain what happened a bit better, so we can work backwards. Tell us, for instance, if you can see the posts under Manage.
Then, you give us a direct link to the blog in question, starting with http.
Then, you check Google for the cached versions of your blog posts.