It is N950. Name was confirmed by Rich Green from Nokia, but apparently this is first time somebody has confirmed it not being tablet.
Green did say in February that N950 should be looked as successor to N900, that was kind of hint to it being phone.

That said who cares about the name as it doesn't tell anything. Hopefully the hw is up up to the competition, that i'm most worried. It will be very short lived as far as the official support goes and i really need/want stuff like HDMI out and according to couple of insiders the multitasking will still be on the very core of the OS so extra umph would not do any harm there... and then we can overclock it to take some more out of it.