Hi guys,
a workmate showed me this site yesterday when I told him I was trying to get into Ruby for RMVXA scripting:
http://www.codecademy.com/en/tracks/rubyIt is free and seems to be really nice from what I´ve seen up to now.
You do interactive courses where you write code in a Ruby sandbox (using your browser).
If you´re done you can execute your code and if you did it right you advance to the next course.
Also, for all achievement and badge hunters out there, there´s that kind of system too.
I did a search and couldn´t find this mentioned on the forums before so I thought this might be helpful for some of you, as it really is for me.