A little after the fact (this post, that is, not his), this, but I liked Steve Krause's post on the different charts & visualizations that the various news outlet websites used during election night here in the US (election night rather passed me by, unfortunately, as I was still staggering about in a jet-lagged hazed wondering which suitcase contained my underpants). Steve wisely points out that many of the visuals, whilst attempting to deliver an 'at-a-glance' picture of the gains & losses on the night, ended up being confusing by trying to incorporate too much information, or presenting things in the wrong way.
The winner, in Steve's view? ABC's graphic (above). No charts, no dials, no elephants, no donkeys. Just a big pair of numbers. Something to learn from, I think.