RALUS is ONLY supported on that particular series of NetGear devices for the 12.5 version - and it was only recently certified after work was done with NetGear.
I believe it will be featured in one of the 12.5 compatibility lists in due course - it kind of bridges both the hardware and software lists - as normally hardware used as a backup target is decribed in one list and operating systems and applications protected by agents are decribed the other - but this is a hardware device protected by an agent.
If you want to backup data on a Ready NAS Pro with 11D you will have enable a CIFS (Windows style) share and perform a share level backup (against which you will still need an Agent for Windows Servers license)
Oh and Backup Exec 10.5 never existed so NetGear's Press announcement
http://www.netgear.com/About/PressReleases/en-US/2009/20090831.aspx
has a typo error in it it should have read as 12.5