Geoffrey Grosenbach, author of the famous PeepCode screencasts, has written a tutorial about using Ryan Davis' hoe library to make releasing your own RubyGems a cakewalk. Geoffrey says that using Hoe turns a laborious, multi-step twenty minute process into only a few Rake tasks. Hoe takes the automation of Gem publishing seriously, and once you've set it up properly you can go as far as let it post announcements (to your blog and/or Rubyforge), build your docs, create an e-mail announcement, run testing packages against the library, as well as actually releasing and uploading the gem to Rubyforge ready for public consumption. CPAN, eat your heart out!

AIR has gone Public Beta, so does anybody use it? eBay does, Adobe has more, and who doesn't love twitter?

Deplate is a Ruby-based tool written by Thomas Link to convert documents written in wiki-like markup to various output formats. Supported output formats include LaTeX, HTML, "HTML slides", DocBook (which means it can also convert to PDF, and other DocBook-supported output), and plain text.

JRuby, a Java implementation of the Ruby interpreter, has reached version 1.0. A massive congratulations are due to the team. At the time of writing, the release has not been announced on the official site, but you can download the final build.
JRuby originally came into being in 2001 as a simple Java port of the Ruby 1.6 code, but has blossomed into a free-standing project that has chosen to innovate in its own way. In September 2006, Sun "acquired" the JRuby project by bringing its then two main developers on board, and since then work appears to have continued at a rapid pace. With the release of 1.0, the team claim that applications 'will just work' and that most compatibility bugs have been eradicated.