Actually there IS a logo for SCJA. I wrote the test, got certified. After passign the test your results are sent to you via snail mail. In that mail you will have a couple of papers (legal agreement between you and Sun). YOu gotta fill youe details in that paper and send to them via snail mail(again). Then you will get an e-mail with link to a ZIP file that will have the logo in GIF, vector format and a couple of them. You can then use them on your logo/business card etc.