A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Depends on how you package it up. What you'll want to do is set the permissions yourself like you did, and then compress the files into either a...
... I gotta learn to actually read readme's :p Looks like if someone wanted to try they'd need to email contact@wolfire.com for permission...
Hmm, looks like Reciever (Wolfire's entry to the 7dfps) is open source. Anyone wanna try their hand at a Linux compile? :D
Or use this handy 64-bit build! (Linked by the dev in the OMG Ubuntu discussion but not in this thread :p)...