From his intro to the document we get these stats...
33,641 DC Comic scans now completed.
That's 95.37% of all DC now scanned.
Just 1,633 issues left to go or 4.63%.
33,000 comics - if you were able to read 4 comics a night, it would take you over 20 years to read all the currently scanned DC comics.
What you won't find in this document is the complete list of all scanned DC Comics. I had to delete that to make the pages work in a browser (imagine a web page with 33K table cells on it, and you start to see the problem.) - If you would like a copy of the original excel document, leave a comment. :)
Thanks to Phantom Stranger for his hard work on this! (and I removed your email in case some crazy DC Lawyer wants to cause trouble.) Also thanks to Darkseid, KingDaubach, Kaotic1, rorschach, Brainiac,Tomander and Heretic for providing updates.