In no particular order...
Japanese town logos
When money buys happiness
The blue and the green
Best tweet ever
Milky Way rising
Procedural City
The impossible art of Li Wei
Best introductory books
50 great examples of infographics
The island of Peleliu
Sorting algorithm animations
Ian's Shoelace Site
Earth Hour 2009
Uncomfortable plot summaries

Helpful links for time travelers:
Advice from Ask Metafilter
Marginal Revolution
Cheat sheet

Movin' to San Fransico!