I’ve seen this mentioned around (KC’s blog mainly, where she links to others who did, who in turn link to many others).
“Clear the address bar in your browser, type in every letter of the alphabet, and list out what is the first URL on the history list.”
Here’s a sampling of mine:
A – adobe.com/acrobat
B – blogger.com
E – eweek.com
J – nothing
L – ldscatalog.com
O – origami-club.com/xmas
R – RupertsKids.org
V – v4.windowsupdate.microsoft.com