I love great visualizations. This is going to be a year for more of them, no doubt. Oliver and his folks at IA Japan have released another version of their mashup of the Web 2.0 landscape and the Tokyo subway map. It is but one group's view on cataloguing many of the significant brands and businesses online. It is done so well that it is worth having. You can buy a poster at their site. You can also download jpegs and even a full pdf.
Buy a map for someone you care about in social media. And tag their site, they do great work.