The thought is that the upgrade may not be released until the 4th quarter at the earliest. Nokia will probably want to release the 5530 XM before taking some of its features over to the 5800 XM, and that isn't expected until the 3rd quarter of this year in Europe and Asia. But for those of you who own the 5800 XM, at least you know that Nokia is working hard on improving your handset and the fruits of that labor could be on your phone by the end of the year.
Nokia 5800 XpressMusic Specifications | Review
source: CellAddict via BGR