While there's not recently anything (like a new version of the app) to show for it, there's not a day that goes by that I don't at least give some thought to this project. I'll eventually get back to writing code for it.
A contributing factor in my not doing so just now is that there's a new version of the language (Objective-C 2.0) coming along with the next major version of Xcode, which should ship at about the same time as the next major version of Mac OS X (Leopard, a.k.a. 10.5), due sometime during the first half of 2007.
While details of Objective-C 2.0 aren't yet public, I've seen enough to make me think I'm going to want to use it, possibly even at the expense of making the app not be backwardly compatible with pre-Leopard versions of OS X.