Interactive Travel Time and House Price Maps - Tom from Stamen recently announced some really slick mapping. They're very attractive and very responsive. Sidenote: Look forward to a guest post from Tom in the near future.
175+ Data and Information Visualization Examples and Resources - Meryl has posted an extensive list of visualization examples and resources available online. Thanks for linking here, Meryl!
GPSed - A site that takes advantage of the data available from your mobile phone, mainly pictures and your GPS trace.
Visualizing the History of Living Spaces - Ivanov et al. discuss the challenges of visualizing motion data from 215 motions sensors in a large office building.