Read this for changing your avatars in iyers.info
Those who have signed up, your avatar will show a default one.
Iyers.info uses avatars from Gravatar.com – Gravatar stands for globally recognized avatar, is connected to your email id. Proceed to Gravatar.com and and create a gravatar for you with the same email id you have signed up with iyers.info. The avatar you upload at gravatar.com will automatically show up here.
Not only at iyers.info , Gravatar profiles get shown on all wordpress based blogs where you comment and where gravatar is being used. This helps you manage your avatar at one place. How is it?