The Electoral Vote Predictor is a great example of a site aligning the bottom-line political issue of the moment: the U.S. presidential elections, with the bottom line data representation technology of the moment: XML.

The site has an RSS Feed (but not RSS auto-discovery), its data is available in Excel format (why not XML? This is really a "Save As" issue these days from Excel).

Great site! But it could even be better if XML was used as the data format as opposed to Excel. It would then become a major data source for a myriad of innovative XML data consumption and repurposing demos etc.