I've always wanted to buy either the PCI or USB Quantum Random Number Generator, but I have no idea what they cost, and frankly it might be a lot! They do deliver a staggering 16 Mibit/s and 4 Mibit/s respectively of random numbers, though, usable on both *NIX boxes and Windows. That's more than I'd ever need!
Other than that, how 'bout a book full of 'em? A Million Random Digits with 100,000 Normal Deviates is perhaps the coolest book they sell on Amazon! I've yet to buy it, but it's only a matter of time. Must be very handy to have such a stock of true random numbers on your book shelve!