Octopress is a great platform based on Jekyll. It can help you in create a great static blog or website.
Gravatar is a great online platform for storing your bio-ready picture.
There is already an gravatar plugin that builds an aside for your block.
This implementation introduces a gravatar keyword to be used inside posts.
You can clone this repository into your octopress plugin directory or move the gravatar.rb file in the plugin directory.
{% gravatar email@domain.com %}
Enjoy, it!