When I saw the link to this in metafilter.org, it struck me that this is OA on the real cheap.
The link http://www.io.com/~iareth/codindx.html describes what the author calls the weirdest book in the world, the CODEX SERAPHINIANUS
is the link to the entire book in a flickr set.
I use my flickr account to document mountain biking rides, putting an entire book online for semi-free has never occurred to me....
I say semi-free because flickr only shows the medium size in the open display. When I login to my Pro account, I can view all sizes including the original at 2400 pixels largest dimension.
Is this kind of do it yourself digitization a trend?
The size of this and its uniqueness might make it a one-off. But consider other useful works that could be done by people who have the time and now thanks to flickr, the server space.