Super small copy change suggestion, please feel free to disregard this.
On the "Add SSH Key" screen that is shown when adding a new SSH key to your account, I recommend changing the "Already have a key" code snippet from pbcopy < ~/.ssh/id_rsa.pub to cat ~/.ssh/id_rsa.pub | pbcopy.
It'd be a shame for someone to see that code snippet, decide to type it out themselves, and accidentally replace the '<' with '>', overwrite their SSH key and then get locked out of their remote boxes. Super unlikely but we've all mixed up our greater-than less-than...
This new notation uses the much less potentially destructive pipe and won't run the risk of overwriting their file.