Almost forgot, also thinking about adding in an option to specify CSS for the image, or something similar, so you get a lot more flexibility instead of just the standard "Set Width".
And I also have custom code that I might adapt that makes a Media RSS Feed using the thumbnails, which gives you the ability to have built in
Cooliris support.
Despite those being cool features to add in, I might put it off for a while to get these more pertinent features out to you more quickly.