Hibernate team member Emmanuel Bernard recently wrote on the issues with the ActiveRecord pattern and statically typed languages like Java.
In this exclusive article, Bryan Evans of the DrySQL project explains how to avoid situations where you're averse to changing your database schema, because of the resulting effort to change your app code.
Nitro/Og provides a different model for web development in Ruby. A new version has just been released, providing a good excuse to stretch your Ruby wings and try it out.
The latest version of JRuby will be presented to JavaOne attendees this week. Included in the demonstrations is a working Rails application and an ActiveRecord adapter backed by JDBC.