It doesn't matter how good of an interface designer we are, there's nothing more valuable than feedback from real people other than yourself using your application. The sooner that happens, the better off you'll be. It helps prioritize features. As...
http://nextupdate.com/blog/archives/2008/10/get-user-feedback-right-now/We'll only send emails for significant product announcements, and those happen every couple of months at most. Of course, we won't give away or sell your e-mail address either.