I pushed version 0.0.6 of RiCal to GitHub. So far it seems to be getting a fair bit of interest. To-date 52 github users are following the project, and 7 have forked it, several of whom have send pull requests for patches and or additional specs when they discover bugs.
I should also mention that I've set up a google group for discussing the library. Anyone can join, but I've got it set so that I need to moderate a new users initial posting.
Run>Code>Run is also keeping an watchful eye and doing continuous integration testing of pushes to github. So far once Run>Code>Run installed the tzinfo gem all the commits have successfully tested.
And finally, Mirko Stocker, who writes for InfoQ, contacted me shortly after I made my low-key announcement of RiCal, and asked me if I would do an email interview. You can see the results of that request here.