[dmccunney]

Nope. Remember that Project Gutenberg hosts books which have lapsed into the public domain. That's not true for a lot of the stuff mentioned. (A decent collection of Van Vogt is available through Baen Book's Webscriptions program, though it lacks classics like Slan.)

You will find the occasional oddity: a couple of Samuel R. Delany's early Ace Double publications just popped up, and Chip is still very much alive. Chip has been in the business a long time - if they've lapsed into the public domain, it's because he allowed them to.

(It is weird when you see stuff appearing on PG by people you know/knew - Delany among the living, and Terry Carr and Laurence M. Janifer among the deceased.)