I would like to let you know that this is a great plugin, thank you very much for making it available. I had it up and running in less than 5 minutes. Also love the way it does not come with a huge default css file that you have to wade through to customise, so it's really easy to style the output for your own needs.
One thing I would suggest is to make the plugin installation guide available within WordPress Admin once activated. I almost never look at the Installation tab on the actual plugin page as it usually just says "download and unzip" :) This meant I was confronted with only the request for ClientID etc. on the settings page and it took me a while to figure out how to find this information. Once I found the documentation it was easy-peasy though.
Couple of feature requests as you seem to be doing a new release:
1) Ability to hotlink at least username, if not actual photo, as Instagram now has web profile pages. This would be a good way of giving credit to photos that are not your own, and to publicise your own feed.
2) Possibility of increasing the limit of photos to 20 (or more). I don't know if this would put too much strain on server, however. Perhaps if this many they could be displayed as smaller thumbnails, like Instagram itself?
Anyway, just some thoughts... Thanks again for the plugin.