> ARM cpu for the desktop/Servrer market ("Denver")

Especially the server market likely requires a 64-bit ISA. To date ARM Ltd. haven't officially announced plans to go 64-bit. But there are rumours:

http://www.computerworld.com/s/article/9197298/Arm_readies_processing_cores_for_64_bit_computing
http://www.eetimes.com/electronics-news/4210884/ARM-64-bit-CPU-coming-soon--says-report

Those could be connected to nVidia's recent "Denver" announcement. I'm sure that nVidia has more detailed information on ARM's internal developments than what is publically known.