User blog comment:Dopp/Meet More Wikians with Improved Profiles/@comment-3080486-20110729112719/@comment-824313-20110730232240

It wasn't the most effective when I tried a similar technique, but you could put a second message on the welcome-user message that tells them to click a link, which would be preloaded to add "#newuserpage {display: none;}" to their Special:Mypage/wikia.css.