CNet said it would happen back in September, but a new memo from iTunes to labels appears to confirm that Apple's music sales behomouth is finally ready to extend song previews to 90 seconds.  Of course, a letter from Apple asking labels to allow longer downloads does not mean that they will. And most fans are already used to going to a range of sites from YouTube to Google search to the artists own web site to listen to a full track or even album before purchasing. 

Screenshot of Apple's Letter To Labels

via Mac Rumors