The folks at Orbit Books have gone over Fantasy art covers and made a series of fantastic charts out of them.

1. Trends in Fantasy Cover Art shows the differences between art between 2008 and 2009.
2. Changing Fashion in Urban Fantasy Heroines shows how the female protagonists are dressed and posed this year, again in comparison to last year.
3. Color Trends of the North American Dragon is both neat to look at, and something I want to buy as a poster.
4. Word Frequency in Fantasy Title Trends shows how the various titles this year compare.

Check them out!