The Noun Project is making clip art icons for every known noun making it a perfect place to look for the images needed for a precise infographic. It can take a lot of time to find a perfect image of a cracked cell phone or a specific kind of dog and the Noun Project makes that a little easier.
"Information is Beautiful released their visualization awards shortlist a couple days ago and if you like visual stuff you will want to check it out." Interesting from both a reading-for-information and creating/composition standpoint.