Use Dramatars as your default avatar!
Use Dramatar generated avatars as your Default Avatar and get dramatic!
Dramatars are a new style of Avatars that come in several flavors. From Spirographs to the Abstract, plus fun avatars like Ragdolls.
This plugin adds a new default Avatar style for your blog discussions and works right along side of Gravatar for those who wish to display those idea for users who have Gravatar accounts. But, you can also just display our avatars. it's up to you! There's no coding or theme changes required, just activate and configure and you're done.
For more information visit http://dramatar.com