During a 1:1 with one of my reports today, he brought a pad of post-it notes to the meeting and was jotting to-do's down on them, and I pointed out how I also had stickies all over my monitor. We ended up talking about how people manage their task list, a very relevant discussion to anyone who works with email, Outlook, Exchange, etc.
Even though I have a lot of software at my disposal to help manage these things, I still use plenty of stickies as well as my trusty moleskine notebook. The "sticky on monitor" concept seems to be very common, at least here at msft.
If it is indeed a more universal thing as we suspect it is, he raised an interesting question: Why haven't the monitor companies gotten together with 3M to figure out how to take advantage of this? Have a post-it dispenser that either is part of the monitor or ships as an add-on (so I won't keep setting down the pad somewhere and misplacing it), make sure that there is enough width outside of the actual screen for the width of one of the larger post-it sizes.