Bluetooth Low Energy Questions

Hi all,

I would like to know if someone could say me what's the current state of 
the Blueetooth Low Energy standard within the BlueZ stack, like 
implementations in progress, etc. Any information is welcome.

On the other hand, I have been consulting the following Bluetooth Low 
Energy Dongle [1]. Does anyone have used this dongle? Is it a good 
option to start working?

Regards.

         Jorge.

[1] http://www.bluegiga.com/BLED112_Bluetooth_low_energy_dongle