A little tidbit I forgot along the way - in Rails the belongs_to (1-to-many association directive at the 1 side) directive needs you to assign it a singular symbol and not a multiple, e.g.:
[source:ruby]class Product < ActiveRecord::Base
belongs_to :category
end[/source]

Here's a really great feature of Redmine that I just love. When you are committing code changes in Subversion, if you enter an issue/task number preceeded by a pound sign, e.g. #42, when you view the repository in RedMine it will automatically link to the task number from the commit message. Very handy!