Rails: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'

Rails: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'

So I've got a Ruby on Rails application that I am trying to run (in development) on Snow Leopard. I've got it working on my Ubuntu computer, but now I need to get my Snow Leopard environment set up.