MORE ON THE CHICAGO ASSYRIAN DICTIONARY: Chuck Jones has gathered numerous links and even a video on the history of the project over at the Oriental Institute blog.
Via James Spinti. James includes a link to the Chicago Hittite Dictionary project, on which he worked for a time and which began in 1975 and seems to be about half finished.
Background here.
Meanwhile, I've just learned that the Pennsylvania Sumerian Dictionary has morphed into an entirely electronic project. I think I still have the 1984 "B" volume sitting on one of my bookshelves.