Hello Jim (and math-fun) : Mathematical Intelligencer 27#1 has hit finer newsstands near you, which means I can now post my rotor-router article on the web. At the moment it's linked to from my Brandeis home page -- I'll work on getting it up on the arXiv, but I think that will require human intervention, since it comes out as a 1 Meg pdf file (mostly due to its containing a picture of the 3 million bug blob), far larger than their usual size limit. My publications list, with "Goldbug Variations" at the top, is at http://people.brandeis.edu/~kleber/pubs.html There's also a link to just download/view the blob picture alone. Jim, you are of course welcome to pass the word on to your usual list of people interested in quasi-randomness. Enjoy! --Michael Kleber -- It is very dark and after 2000. If you continue you are likely to be eaten by a bleen.