I passed the test today with 79%. I had studied for less than a month, so I was really glad to pass. I mostly used "More Servlets & JSP". I read HFS for a week for the newer features (EL, Custom tags), and found them pretty hard to memorize. On the whole I found this a much tougher exam than SCJP, though that doesn't seem to be a common opinion.
Thanks JavaRanch and the authors of HFS!