Somehow I can't help wishing this went the other way around... you know, all of CPAN suddenly available to my Ruby scripts (and I bet by day's end, someone will have pointed out how to do just this using Inline::Ruby). *grin*
For those that might care, on the ruby-talk list discussions recently have brought up the ideas of running Ruby through Parrot. In the future you may not even need this type of module!