Here's how I think it all went down:

• I posted this cartoon about employers blocking Facebook in the workplace.
• I thought Shel Holtz would like it for his Stop Blocking blog.
• He did, and posted it there.
• Beth Kanter saw the cartoon and blogged about both it and Stop Blocking.
• So as not to draw on Shel's or my bandwidth, she posted the cartoon (which is Creative Commonsed up the wazoo, so all is kosher) to Flickr so she could link to it there, and tagged it "socialsignal".
• We have a Flickr photostrip on the front page of this site, which randomly selects Flickr photos tagged, you guessed it, "socialsignal".

And tonight, this is what I saw (click to enlarge, and look in the lower right-hand corner):

And the circle of life continues.