Started work on a new readme file with links to individual demos.

README.md

@@ -1,8 +1,17 @@
-Demos: http://cesium.agi.com/
-
-Our mission is to create the leading web-based globe and map for visualizing dynamic data.  We strive for the best possible performance, precision, visual quality, ease of use, platform support, and content.
-
-Mailing lists:
-
-* Development - https://groups.google.com/d/forum/cesium-dev
-* Announcements - https://groups.google.com/d/forum/cesium-announce
+Cesium
+======
+
+### Mission ###
+
+Our mission is to create the leading web-based globe and map for visualizing dynamic data.  We strive for the best possible performance, precision, visual quality, ease of use, platform support, and content.
+
+Mailing lists:
+
+* Development - https://groups.google.com/d/forum/cesium-dev
+* Announcements - https://groups.google.com/d/forum/cesium-announce
+
+### Demos ###
+
+http://cesium.agi.com/
+
+<a href="http://cesium.agi.com/LotsOfSatellites/"><img src="http://cesium.agi.com/t-LotsOfSatellites.jpg" width="176" height="99" alt="Lots of Satellites"></a>