With absolutely no legend, new users (or visitors) won't know what to think
pssst, titles in the mouseovers
What's that big flame thing? Hover...... ohhhh that's what it is.
All of them don't have them but that'll get fixed. I would think by now most everyone knows to hover over an image. A legend is useful the first time that you need to know, but when you've been visiting a site for a year, it's kinda wasted space
