I don't get it. The FAQ implies they aren't using jar files, so are they providing a custom classloader instead? If they inherited multiple-version support from rubygems, how do they know which version I want visible?
See also buildr, which attempts to be a drop-in Maven replacement using a ruby DSL built on top of rake. <a href="http://buildr.apache.org/" rel="nofollow">http://buildr.apache.org/</a>