I was inspired to start this discussion by Ilya's post on Design for Geoportals and Services which highlighted the data visualization work of the San Francisco based Stamen Design.
I am a firm believer that inspiration comes through discovery, the collision of new ideas, and the ability to reconsider possibilities from a fresh perspective. With this in mind, I'll share a few examples of data visualizations that have inspired me.

The first is Nicholas Feltron's Annual Reports. I have yet to see a more comprehensive visual representation of quantified self. His work is not only stunning to behold, but is amazingly effecient at providing an engaging summary of the previous year.
The second is tele-present water by David Bowen. This is a physical installation that visualizes wave data from a NOAA buoy in the Pacific Northwest (Station 46246). Typically I think of data visualization as a two-dimensional pursuit, but David shifts this context from Flatland into three-dimensional space.
How about you? I'm curious to know what data visualizations you've encountered and how they inspired you. Please share by posting an answer below.
Speaking about geoservices I always thought that design has the same importance as a functionality. It is obvious that MX team completely shares this point of view. I read somewhere that it was declared by Marinexplore's CEO Rainer Sternfeld (correct me, if I'm wrong).
Therefore it is interesting to share two beautiful examples of design in application to geoservices perfromed by the Stamen: Hurricane Tracker and Chesapeake Bay Grasses. Those guys shows not only the remarkable design work, but also the highest level of the implementation.
Jason-3 is the fourth mission in U.S.-European series of satellite missions that measure the height of the ocean surface. http://sealevel.jpl.nasa.gov/images/ostm/Jason-3-over-california-th300.jpg
The dataset feed has a lot of activity, it would be great to know what kind of projects are hiding behind all this data. The story behind the data, is what we care about. What kind of great projects are you working on to change the world we live in? Are you using it for a school project? For a work related project? or for the Earth Day Data Challenge?
Story telling using data visualizations at its best. We are in the Anthropocene indeed, Marinexplore is at the forefront of technologies needed to move forward in managing our oceans and its ressources. http://vimeo.com/anthropocene/water
A great interview with Cassandra Brooks on her Antarctic journey and her experience collecting data on a see of ice. Read more
Can anyone tell me if roughness of the ocean can be modelated by this? http://www.youtube.com/watch?v=ay8OMOsf6AQ :)
Aquarius Ocean Salinity Data overlay on our planet gives us a clear idea of satellite path http://www.nasa.gov/images/content/542616main_aquarius20110505-43_946-710.jpg Find aquarius sea surface salinity on Marinexplore Ocean Data Tool .