Nokia has confirmed the N91 Music Phone, initially due out for Christmas 2005 has been delayed due to isses with the Music DRM (reports The Register). As the N91 launch date continues to slip (and starts to get a whiff of vapour ware), the Sony Ericsson Walkman phone from 3GSM is starting to look more and more attractive. Not least because its 4gig of memory is in flash, while the N91 runs off a 'miniature' hard drive.