alias_method for class methods

class Login
def self.super_user
   system_admin = Role.find_by_desc("system_admin")
   find(:first,
     :conditions => "permissions.role_id = #{system_admin.id}",
     :include => :permissions)
 end

 class << self
   alias_method :system_admin, :super_user
 end
end

Some links:
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/60494
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/60487
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/60489

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/255814