Some of you might have gotten a little suspicious seeing that I had stocked up on Wi-Pis earlier. Well, you are right to be suspicious, as I was thinking of a little Wi-Fi-based project.
I came to the realization that a wireless network's SSID can serve a "beacon" and "advertising" opportunity. Coupled with some nefarious networking tricks on the Raspberry Pi, I can make a small device that I can carry with me to advertise my site to everyone that is nearby.
How did I do it? Find out at my posting on my blog at http://goughlui.com/2015/07/25/project-adverpising-a-wi-fi-beacon-with-raspberry-pi/