Adam Sacarny noticed some dice in my office today and we came up with a good idea for a web-accessible random number generator: Put a die in a clear plastic box attached to something that can shake it. Train a video camera on the box, and pipe it to some digit-recognition software. Then whenever someone clicks on a button on the website, it shakes the box and read off the number. (We can use one of those 20-sided dice with each digit written twice, so we get a random number between 0 and 9.) Pretty convienent, huh?
I’d like to set this up but I assume somebody’s done it already. In any case it’s not nearly as cool as that program that figures out what you’re typing by listening to the sounds of the keystrokes.
Lava lamps, sunspots, atomic decay… it's all been down before.
Dirk Eddelbuettel has package random on CRAN that take true random numbers from random.org.
While it's not strictly for generating random numbers, Diceware might be of interest to those of your readers interested in random passphrases, and it does use dice. See http://diceware.com/.