Using Ruby 1.8 and 1.9 side by side in OS X without RVM
Over on the Archcoder blog, he talks about using brew to use Ruby 1.9.1 and 1.8.7 simultaneously on your system without having to use RVM. This is nice if you don't want to switch between Ruby version and want to get stuff done in rails, but still mess around with Ruby 1.9.1
http://archcoder.com/articles/20100718/use-ruby-191-side-187-terminal