Dan:

I see that the last updates took place sometime in 2009 but you're still actively involved in the discussions.  Are you still working on the code in your spare time and planning further updates, or is the code rock solid and not necessarily in need of any further tweaks?  I'm just curious what you believe the true status of the project to be and as we start moving forward.

Thanks.

Aside from bugfix builds, etc, I have not been actively working on the code. The next major feature to be done is a UI for toggling blocking, rule customization, etc (as in those extensions in other browsers), but as I don't currently use IE I have little need for that anymore. 

That said, bug-wise I believe things work pretty well (though I haven't tested much on IE9). If you find bugs, I would be happy to fix them. 

So I'm not quite sure I would say this is orphaned code, but it's not under new development. If you're interested in taking it over and adding those additional usability features, I think that would be great.