Setting up Ruby on Rails on Mac OS X with Locomotive and MAMP

Here's a succinct rundown on how to get ruby on rails running on your mac using locomotive and mamp...

locomotive mamp = ruby : Red91.com

It's a lot easier than the steps on Hivelogic, but the Hivelogic tutorial definitely is a good introduction to setting it up with the command line and is probably more flexible as a result, even if more complex -- especially when you start running into bizzare "Could not find rails (> 0) in any repository" errors, which can be remedied by using these blog posts:

Army of Evil Robots | Could not find rails (> 0) in any repository
Mac OS X 10.4 (Tiger) + RubyGems + Rails