This plugin will give visitors an avatar theme of your choice if they don't have a Gravatar
Simply install the wp-randomavatars plugin into your WordPress plugins folder (/wp-content/plugins) and activate it via the Dashboard.
If your WordPress theme does not support avatars (rare), simply add this snippet of code where you want the avatars to appear:
Icons should be sized at 48x48 pixels. You can use a free graphics viewer/resizer such as Irfanview at http://www.irfanview.com to do this. To find themed icons for your blog, many of which are free for personal and commercial use, see http://www.iconfinder.net.
When you have your icons, just add them to the wp-randomavatars/images folder in your WordPress plugins area. That's it! Enjoy!
Allow your visitors to * Use custom random avatars instead of the default gravatars i.e "Mystery Man" avatar we see everywhere.