If you hover over the "Home" link or the logo link you get the base URL, but if you click on it you get "/wagn/|home card name|" appended, and this is what will show up on bookmarking and news services. So Wagns that get popular and then change home URLs will at best not get the ranking they 'should', and at worst leave broken URLs floating around the net.
def index
if User.no_logins?
redirect_to '/admin/setup'
else
params['id'] = System.setting('*home')
show
end
end
Works. Awesome! Closing.