Users could link to an image/script that would countdown for every day that pass. Like "Ubuntu 8.04 - 93 days left".
And users could post it on their blogs, forums, websites, etc and it would generate a buzz and hype around the upcoming Ubuntu release and get people excited.
It was great. I propose we do the countdown again, now this time for the 8.10 "Intrepid Ibex" release.