2009/1/12 Andrew Gray shimgray@gmail.com:
[posted to commons-l and wikien-l; someone may want to forward it to wikisource-l, perhaps?]
I've just run across this article, which might be of use in helping those who work on the eternal problem of determining whether or not a given 20th-century work is in copyright in the US.
We don't use the copyright not renewed clause stuff and commons' general support for Must be PD in the country of origin as well as the US means we mostly dodge the issue.