Recommended Permissions for Releases Directory?

I’ve got a bit of an obvious question here, but not having grown up on
Ubuntu, I’d like to hear opinions from some people who have been
around the block a bit more than I…

What is a good permission set for the /shared and /releases
directories created by Capistrano?

I think rwx is pretty obvious choice for the deploying user, but I’m
not sure what the circumstances would be that would warrant rwx for
group and other.

Suggestions appreciated.

Thanks,
Bill