Version 0.8.0 of Trinidad (formerly "Tomcat-rails") is now available to download.
Trinidad is a JRuby-rack, Tomcat-based server that looks to replace glassfish gem.
This version introduces support for Rails 3, and an extensible API that should allow the developer to add Tomcat features within modifying the main gem. Database connection pooling is currently available as an extension.
The project can be downloaded from github.