Well, the text is from Wikipedia (and is thus GFDL)
And I then took the text and pasted it into the field and clicked "Create".
But the program at wordle.net analysed the text for word patterns and frequency and the like using (according to the FAQ) proprietry code and assembled it into a pretty picture.
I would presume this means the copyright belongs to wordle.net, which is CC-by-NC 3.0, which means it can only be used for non commercial use. Such a restriction means it isn't fully "free", as GFDL and CC-by-SA allow subsequent commercial use. Ours is not to reason why.
UPDATEAh, the outstanding Mr Feinberg has got back to me.
The site itself is CC-by-nc-sa (meaning attribution, non-commercial, and sharealike is required)
But the word clouds are cc-by, meaning all that is required is attribution. He has clarified this on the site's (www.wordle.net)'s FAQ.
Huzzah!
To celebrate, here's another one, from
Wikipedia:Requests for arbitration/C68-FM-SV/Evidence:
This post has been edited by Neil: