I'm a big fan of this plugin and its minimalism.
I've been able to hook into the widget to change the template, adding the profile picture along the way, but I'm still unsure of how to use the "tweeple_do_entities" filter.
I'm attempting to create something like the following:
(Forgive the pseudocode.)
$output .= sprintf('<img src="%s" />', $tweet['entities']['media']['media_url']);
Any guidance in outputting the pbs.twimg.com entities would be extremely useful.