I've been looking for ways to display Ireland election or referendum results dynamically live interested in visualisations and mapping of info and web 2.0 here are the two combined, Many Eyes an Visual Communication Lab IBM research project.
Anybody can upload data sets from various sources and use the visualisation models to visualise the date in various ways from graph to word clouds to heat maps.
Somebody called Colm has upload and visualised many interesting data about population, houses, politics and GAA.
Compare Bertie election 2007 acceptance speech and his resignation speech a year later (switch between 1 or 2 words on the Many Eyes sites).
Its a pity it doesn't have Irish electoral constituencies of other administrative districts if any has the shapefiles for them please add them.
Google had visualisation API for heat maps now to but only maps and recognises individual countries or administrative areas at the moment as far as I can see.
Im going to see if i find or add Ireland administrative boundary geonames.