Configuring Ruby SDK in IntelliJ
I have installed the Ruby Plugin into my current IntelliJ 7.02.You have to specify a 'Ruby SDK' when creating a new Ruby project. For me it was not obvious what that meant... But you cannot run your Ruby scripts out of the IDE as long as you do not configure the 'Ruby SDK'.
After experimenting a bit I found out that you must point your 'Home Directory for Ruby SDK' to /usr. IntelliJ will then detect your Ruby installation.
I am running OS X Leopard with the default Ruby installation.

