Which does not mean it's complete in any way - they simply release what they've got at that point: http://rakudo.org/status
"Common things that are known to have problems or not work in Rakudo (As of 2009-02-28.)" list contains "variables in regexes". It doesn't really matter how often they release in that case...
That's "as of february this year" and still open in november.
Rakudo releases a new version on third Thursday of every month, as it has since December 2007.