I've seen quite a few people mention perks in different perk trees by name. I can't remember any specifics but someone posted about the stealth perks and had each of them named. The only source I thought we had was http://www.gamesas.com/index.php?/topic/1233644-sammus-eurogamer-qa/ post by Sammus. Is there another source of info on this with names for the different perks?

No, afraid not. Every other site out there just copied his info.

Example:

Perk Tree: Block

Block Perk: Bash Disarm

Is this what you mean? Sources: http://elderscrolls.wikia.com/wiki/Block_(Skyrim), http://elderscrolls.wikia.com/wiki/Bash_Disarm

The pickpocket, smithing, 1h, and block trees did come from other sources.

The Block perk tree was shown in the gameplay demo video.

Smithing was released by some other fansite that did a hands-on. I forget the exact name but it had the word nerd in it.

I don't know where we got the pickpocket tree from, but it may have been info released by BGS.

But the majority of known perk trees came from Sammu's excellent posts, including sneak.