Lost of web pages make their content available without charge for "educational purposes". IANAL, but I guess an encyclopedia is clearly educational, so does that apply to wikipedia as well? If yes, it would mean that we could copy texts and images (all while giving proper credit to the original source).
The trouble is that we could not re-license it under the GFDL. That's probably OK for images. That's one of the main uses I envisioned for the image description pages--to list credits and external sources. But I think it's important for our text to be GFDL'd, and we can't do that with borrowed copyrighted texts. We can, however, summarize them in our own words and link to them--that's really not that much work. 0