Go to this website: http://en.gravatar.com/ and sign up with the email you are using on Buxr.com
Once you upload and activate an avatar there it will be automatically visible on Buxr.com
Go to Gravatar.com and sign up with the email you are using on Buxr.com. Once you upload and activate an avatar there it will be automatically visible on Buxr.com
Your name or your email? As far as I know gravatar uses emails, not names, and unless someone has access to your email they cannot associate an avatar with it on the site