Hi,
Rabbit 1.0.1 has been released!!!
Web: http://rabbit-shockers.org/
Install: gem install rabbit
http://rabbit-shockers.org/en/install/
Summary: Rabbit is a presentation tool for Rubyist.
This is the first major release!
Matz is one of the Rabbit users. He used Rabbit at RubyConf
2010:
RubyConf 2010 Keynote by Matz | PPT
There is a Rabbit presentation demo party in Japan at this
weekend. You can see many presentations that use Rabbit (or
other tools) at the party. Please enjoy it. 
RubyKaigi 2011: RubyKaigi 2011(July 16 - 18)
== Rabbit?
Rabbit is a presentation tool for programmer, especially
Rubyist.
You can create presentation slides as a text format. So you
can use your favorite editor and version control system for
creating presentation slides.
Rabbit has programmer-friendly keybord interface. If you
type a key then you will get what you want because Rabbit
uses Emacs/Vi like key bindings by default.
You can just use Rabbit as a slide viewer because Rabbit can
also show PDF format slide. You can create by Keynote or
what you like and use Rabbit as a slide viewer for
programmer-friendly keybord interface.
You can customize slide look and feed by Ruby. It’s very
important for Rubyist that you can program when you make
presentation slides.
Thanks,