This plugin is almost perfect for what I need, but I have one request: the ability to configure which image size is used by default (in other words, instead of defaulting to "thumbnail" let the user decide).
I prefer to display my images 500px wide. I don't want to change the options every time I choose an image, and I don't want to change the site's definition of "thumbnail" to be 500px wide, either.
If the plugin uses the media library's definition of "thumbnail" can it be changed to allow use of one of the other pre-defined sizes? I don't have a problem changing the site's definition of "medium" to be 500px, so if I could configure the plugin to post "medium" size images instead of "thumbnail" size images in posts, that would be ideal.
Is this possible?