Hi, don't how many of you are interested in this, but there is some work being done related to the "jailbreaking of the PDF". The best resource to follow it (IMHO) is http://blogs.ch.cam.ac.uk/pmr/
This kind of project is more related to Open Access movement than Wikisource itself, at the present time, but I sense it will be more imnportant in the future.
After all, Wikisources will have to discuss what they want to do with "born digital documents", and decide if they want to stick with transcribing old books or they agree in opening the library to other kinds of documents.
My personal opinion is that the more important (added) values of Wikisource is integration with other projects and hypertextuality (possibility of connecting texts to each other, and quotes to the original source, and cited authors to their books). So being able to import CC-BY licensed scientific documents is something worth a study/discussion.
So we maybe want to explore this stuff.
Aubrey
wikisource-l@lists.wikimedia.org