I have NO clue who can use this aside from people owning the Torch already (lucky!) or hybrid builders, but it's still a great leak! This is exciting if we can get the hybrid's that will sport majority OS6. Being a programmer myself, I know a good amount of it will not intertwine due to the API's allowed on OS5 and on OS6 being different.
You 100% cannot install it on your 9520, or any device currently available aside from the Stratus and the 9650 I do believe. There may be 1 or 2 more, but I don't think there are.
I didn't download it personally and I'm not aware of more links. :\ This is however only useful for people who own a 9800 because well, it's for their device (The same reason you won't install a 9520 OS on a 8520) or are hybrid makers.