Hi ruby-core -- I've set up a site where you can ssh in and have access to a bunch of historical and modern Ruby versions and implementations, including Ruby 1.0 through 1.9.2 snapshot, Rubinius, JRuby, and Ruby Enterprise Edition. For more info: http://ruby-versions.net. There's a link there to email me to request a (free) shell account. Please keep in mind that the purpose of the site is to compare features and learn about Ruby history. You can do benchmarking but please don't use it for full-scale development. David -- David A. Black / Ruby Power and Light, LLC Ruby/Rails consulting & training: http://www.rubypal.com Now available: The Well-Grounded Rubyist (http://manning.com/black2) Training! Intro to Ruby, with Black & Kastner, September 14-17 (More info: http://rubyurl.com/vmzN)