Some top music managers have told CNET News.com that their clients haven't seen any money from the licensing deals the four largest music labels have signed with YouTube over the past 18 months. According to a statement from Google-owned YouTube, the Web site is banking ad dollars generated by the artist's music and is sharing that money with the record labels. What the managers want to know is why little or nothing has trickled down to the artists. (News.com)