A couple of weeks ago I released Regulus for wordpress 1.5, and it got quite a few downloads. It was also picked up and used as one of the themes on wordpress.com (which was nice :) ). One of the biggest complaints I got about it was that it didn't work with wordpress v2.
So I've updated the theme again, there are a stack of new features (all listed on my blog - http://www.binarymoon.co.uk/2005/12/regulus-20/).
Enjoy