Ruby 1.9.1 Release Candidate 2
Ruby 1.9.1 Release Candidate 2 has been released. You can use the preview install instruction to install. I certainly will upgrade.
Locations:
The source
ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.1-rc2.tar.gz
Installation Screencast
http://www.rubyhead.com/2009/01/14/installing-ruby-191-from-source-on-ubuntu-screencast/
Installation on Ubuntu
http://www.rubyhead.com/2009/01/11/installing-ruby-191-preview-1-rails-on-ubuntu-804lts-hardy-heron/