Over at Aidan?s blog he has just installed some code to display gravatars (Globally Recognised Avatars) on his site. Basically you register your email at site.gravatar.com and assign a thumbnail image to it, and when you comment on anyone?s blog who has added the gravatar script your image will show when you comment.
Of course I cheated and just installed a plugin, meaning I only had to add a pre-defined bit of code to my comments.php and style.css files in my template.
It may not add anything great to the site but at least it makes the individual comments stand out more and add more of an identity to them.
The only problem I?ve stumbled on so far is that when I visited Aidan?s blog and commented, my gravatar was still displayed using the default thumb, and I guess this is because it is stored in the cache along with my email address. I think it may be prudent to clear the cache every so often so that the images are refreshed from gravatar.com which should solve this, although it?s good to keep images cached to improve page load times.