Separate signatures from posts.

I would love it if you could separate the signatures from posts in such a way that any changes made to the signature would be reflected in all posts with the signature.  In addition so the signature didn't show up each time someone quoted a post.  The signature images people use are neat, but I dont need 3 screens full of the signature with the content I'm trying to read when people quote the person using the image in their signature.

p.s.  Please for the love of god fix the login issues.