I've been using icons from http://www.glyphish.com/ http://www.glyphish.com/. They let you use them for free but I think they ask you to credit them somehow. I'

I've been using icons from http://www.glyphish.com/ http://www.glyphish.com/. They let you use them for free but I think they ask you to credit them somehow. I'm still hacking around, so I haven't found out exactly what that means but I'd be happy to add a link to my "about" page pointing to them if that's what they are asking.