I don't expect this will impact anyone as I don't think anybody's using the old CMS package but I'm posting just in case. I'd like to check in some UI changes to CMS on HEAD in the next few days. My intent is to preserve (or fix) existing functionality while integrating the package into the toolkit, i.e., ripping out the custom authentication/error functionality, etc. I've already done away with the frames (creating a tabbed interface based on the site-master CSS file) and reworked many of the old pages using listbuilder. I don't plan on touching the API anytime soon, if at all.
If anyone's interested in seeing a couple of screenshots, ping me in #openacs (or let me know if we still have a file-storage module somewhere on openacs.org).
Also, if anyone's keeping track, I'm OK with being listed as the maintainer of the package, since I believe I'm the only one using it at this point.