I've seen quite a few, actually... many of them on Hacker News.
http://www.cacr.math.uwaterloo.ca/hac/index.html
http://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Compute...
http://omega.albany.edu:8008/JaynesBook.html
http://research.microsoft.com/en-us/um/people/simonpj/papers...
These are from my own bookmarks... looks like there are a lot more at http://www.reddit.com/r/csbooks/top/?t=all