From Kotaku:
"Prices for the PDFs ranging from $US4.99 to $US9.99, with a few more expensive outliers for complete sets and the like. According to a piece on Wired, the collection currently contains over 80 products, ranging from 1st Edition all the way to 4th."
A few free ones as well, and all PDFs are searchable, too.
I thought I has already seen this deal here but then I realized it was just http://games.slashdot.org/story/13/01/22/1929206/wotc-releas…