Hmm...well, this was confirmed quite a while ago. Before Christmas, even. Since it's a new publishing house, it was unlikely that any of the NOM team were going to stay with the mag. They technically worked for EMAP, and Nintendo chose a different publishing house for a reason. They obviously thought the mag needed a change, and if you keep the same writers, then you won't get a change.
Rob sent me a PM on Total Games Network, along with the press release of the changeover, that they were all getting the boot on the 23rd December. Lovely Xmas gift.
Though according to Dean, it was on the cards for a while. Some are moving to other magazines, some don't know what to do.
Anyone remember Chandra from CUBE? He's the assistant editor for the new NOM, which is called Official Nintendo Magazine. ONM. Doesn't roll of the tongue as well, does it. :p