I am following the guide http://edgeguides.rubyonrails.org/plugins.html and it seems to be slightly outdated. Could you have a look on it and tell me which sections should be done in a different way in Rails 3?
EDIT1: Links to alternative tutorials are also very welcome!
You’re right, that guide isn’t the best (the last changelog entry is April 2010).
Instead, I’d recommend you read: https://github.com/radar/guides/blob/master/gem-development.md