Hi,
This is crossposted to the main list.
As promised (or threatened, as you like), I've merged the Ruby 1.9.3/Rails 3.2 code and it is now master. Since it requires a change of ruby version to use I've also bumped the version number up to 2.0.0, even though there isn't really any major new functionality.
So to use master or 2.0.0 or later you'll need to switch from ree to 1.9.3 for your ruby. There is an included .rvmrc for users of rvm.
I also pushed the missing 1.2.2 (which I found) and 1.2.3 as the latest version using ree. For the most part I expect I'll be working off of the new version, so it's unlikely that very much more will happen here unless it's either really important or easy to backport. Not a lot is going on right now with the code anyway, so hopefully that won't prove to be too much of a problem.
I plan to update the documentation on github presently.
Howard