You can see the recipe on how to put it in a webpage here.
Learn more about UDW in this brochure.
Individually: Every Ubuntu spreader should, directly or indirectly, put at least 4 UDW buttons in a public website.
Globally: Everyone puts at least 1000 such web site buttons making the Ubuntu Developer Week a notable event!
Use promotional posters to excite users about the new Ubuntu Karmic Koala (9.10) release, and raise awareness of the Ubuntu.
Individually: Every Ubuntu spreader should put up at least 5 posters of their choosing in acceptable public areas.
Globally: Everyone puts up 100,000 posters in acceptable public areas.
<img src="http://countdown.immanuel-peratoner.de/index.php" alt="Ubuntu 10.04 Countdown" />