Rational numbers in D

[Joseph Rushton Wakeling]

Sorry for the double-post -- I already asked this in d-learn, but this may be a 
better place to ask.

What's the current state of affairs and roadmap for inclusion of rational number 
support in D?  I've come across David Simcha's work:
http://cis.jhu.edu/~dsimcha/d/phobos/std_rational.html

... and a feature request on the bugzilla:
http://d.puremagic.com/issues/show_bug.cgi?id=7885

... but this isn't mentioned at all in the review queue:
http://prowiki.org/wiki4d/wiki.cgi?ReviewQueue

What's the status of work/planning for this feature and is there any kind of ETA 
for when it might land in Phobos?

Thanks and best wishes,

     -- Joe