I don't see a signature in

Megan — Thu, 13 Aug 2009 13:38:08 +0000

I don't see a signature in your account. Go to "My account" then "edit" to add a signature.

Signatures don't show up unless your posts are a certain minimum length. Yours are probably all too short to make ths limit. You should also know that signature links all have the rel="nofollow" attribute, which means they won't pass any value for search engines.