Do you foresee any issues pinging gravatar as fast as every 200ms (based on your source) when someone is typing in their e-mail address? Since you are checking

Do you foresee any issues pinging gravatar as fast as every 200ms (based on your source) when someone is typing in their e-mail address? Since you are checking domains and if they are correct, could you check to see if the email is valid form before pinging gravatar for an image? It seems like it'd be a little less load for all parties involved.