I'd be very interested to see someone do a comparison of Ruby and the new features in Perl 6.

It'll happen, count on it.

In fact, I foresee a three-way comparison -- with Ruby and Python.

But we need to get Perl 6 a little more fully mapped out before we can start comparison-selling it. For example, the most meaningful comparisons can't be made at all yet, because we haven't finalized the Perl 6 OO mechanisms.