If you haven't heard about this, you haven't been paying attention 
But here it is anyway...
http://www.sun.com/2006-1113/feature/index.jsp
I know it's not strictly Ruby-related, but it does mean that JRuby will now have a best-class open-source JVM under it. So other than prejudices folks might have about the design of Java or the JVM, there's now no political reason why you couldn't run JRuby on a typical OSS system.
Anyway, exciting news for Sun, Java, and everyone with a stake in such things.
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Charles Oliver Nutter, JRuby Core Developer
Blogging on Ruby and Java @ headius.blogspot.com
Help spec out Ruby today! @ www.headius.com/rubyspec
headius@headius.com -- charles.nutter@sun.com