Here goes: everything you knew about working with routes in Rails 2… is history! With Rails 3, you’ve got to roll up your sleeves, unlearn what you learned, and route the new way around. And this time, it’s faster, cleaner and a lot more Ruby-like.
via engineyard.com
Great overview of the routes functionality in new Rails 3, compared to what (you might got used to) in Rails 2.
