I didn't care for the ugly default Ning green Success Message. Here's a quick snippet to style it up a little if anyone wants it...

div.notice-successMessage{border:2px groove #fff;border-radius:10px;-moz-box-shadow:0 -1px 6px -1px rgba(0,0,0,1);-webkit-box-shadow:0 -1px 6px -1px rgba(0,0,0,1);box-shadow:0 1px 8px 1px rgba(0,0,0,1);margin-bottom:40px;background-color:#b6dae5}