The Main problem of Google Community Users is the Lack of Signatures. Even old users who have some decent number of posts, who are theoretically eligible to have signature, are yet to get their signatures. The main reason people look for signatures is they are do follow therein they promote their website and blog.
I got a solution for that. When you type a link.Its is converted to plaint text.
http://www.google.com is not a link but just a text.
Google and Select the text and Click the hyper link in the Editor and Paste the URL.
Now its a URL and it will act as a signature.
Manage with it until you get signatures enabled.