The key features of the new version 3 are:
- supports Ruby 1.9.2
- supports Rails 3
- supports Sinatra
- supports Padrino
- much cleaner code due to decoupling of rails
- added more renderers (breadcrumbs, text only, links only in addition to the default html list renderer)
More information can be found on the github page and the wiki. Please report any issues or just post to the mailing list.
There is also a new public project with a sample application running with Rails2, Rails3, Sinatra and Padrino.