Bruce Schneier links to an article (and paper) about remotely fingerprinting a physical device using clock skew. I haven’t read the entire article yet, but it sounds extremely interesting.
Several Slashdot comments give how to turn TCP Timestamping off in Linux and OpenBSD (at least). While turning it off would certainly help, it would [...]

From Mimerki:

Take the quiz at dicepool.com
You are the large, round, friendly d20! (You probably didn’t know this, but the shape of the twenty-sided die is called an Icosahedron.) You are the friendly, outgoing, outspoken, leader of friends. You are often looked up to, even though you don’t normally deserve it. Most other types secretly wish [...]