Yes, you can configure the integration avatar from your backend > Easydiscuss > setting > layout > Avatar > Profile Picture Integrations
Hope this help.
Sorry, I don't think I explained this well. I want to set up an avatar image that will be the default avatar for anyone who has not specified one. I don't see how to do this in the setting you mentioned.
I am sorry. Do you found the setting? backend > Easydiscuss > setting > layout > Avatar > Profile Picture Integrations. Here the Screenshot: http://screencast.com/t/LoQU0iNhA .
You can choose default avatar or you can choose avatar from Profile Picture Integration list.
Correct me if I'm wrong, did you want to change the default image for the Easydiscuss avatar? If so, you can change the image file here: ../media/com_easydiscuss/images/default.png. Hope this helps.