if your interested in making signatures look up a bunch of tutorials on deviantart.com
and
http://www.pixcelgallery.com/d/192906-1/A+guide+to+Photoshop+and+Sigmaking.jpg for a general overview of making coolio sigs its like the Holy Bible for signature makers lol.
im sure you already know but planetrenders.net gots nice cut-out images for better signatures.
CnC:
I love your current signature. id say try to keep text away from the edges for most sigs but you got no other good placement so it looks good there.
tip: the smaller the size of the signature,the less you put in, the less empty it looks.
you learn pretty fast. keep it up