Turns out that Avery Injet Labels (#8293) have an Easter egg on the packaging. The sample label on the front of the box feaures the address of Brad Pitt's character in "Fight Club." I suspect somebody over at Avery is going to be looking for a job.

Thanks to seanbonner.com for breaking the story, and to Boing Boing for alerting us to it.
seanbonner: Fight Club At Staples