I've tried and searched other flickr related plugins and Flickr Pick-a-Picture is the simplest and non-bloated of all. However, there is one feature that is missing - from my perspective of course, the option to use flickr as the image source.
I personally like it better to pull from a reliable image hosting like flickr (and picasa) [including my own images] instead of uploading to my own server and filling it up, as that is a limited resource.
So I would like to suggest this feature/option for this plugin. Use flickr as "img src" instead of copying/downloading the file to the server or WP installation.
Thank you very much!