A friend just pointed this out to me, sitting on an FTP server at National Geographic.
It's hi-res images of what appear to be all of the pages of Codex Tchacos, which contains the Coptic of the Gospel of Judas. My guess is that these images match the plates in the Critical Edition of the Gospel of Judas, but if anyone is doing serious work with the Coptic of Judas (or any of the other documents in Codex Tchacos) then you probably want these images instead.
And, while we're on manuscript stuff, have y'all seen the online edition of Codex Gigas? (hat tip: Mark @ Biblical Studies and Technological Tools blog) If not, you should. It is way cool! Have fun playing with the "Browse the Manuscript" feature. Also: I didn't know that Gigas had editions of Antiquities of the Jews and Wars of the Jews in Latin, amongst other stuff. How cool is that? Here all along I'd just thought it was a Latin Bible.