From timeline, to bubbles to stack of $ to gauges and worldmaps, you will find what you need to visualize your data with Google Gadgets.
http://code.google.com/apis/visualization/documentation/gallery.html [2]
For the developers, don't forget to check out the Google Gadgets APIs [3]
Links:
[1] http://linux.philosweb.com/drupal/category/it/software/development
[2] http://code.google.com/apis/visualization/documentation/gallery.html
[3] http://code.google.com/apis/gadgets/docs/overview.html