Filed under: Cellphones, Portable AudioThe latest label following BMG to join Nokia's Comes With Music service bandwagon is none other than Warner Music Group. The third-largest label joins the powerful cadre of labels on the service, which as of this posting lacks only EMI for a full major label lineup. As a reminder, the service allows you to download music for 12 months and then keep it as long as you own the device or transfer to a PC. Now, of course, we just need