Looks pretty good. Have you considered turning this into a Chrome extension?

I've not found a simple photo editor extension that I can use within Chrome. Ideally I'd just like to right click on photos, do simple crop/resize/quality/colour conversions and have the results available for insertion into gmail attachments or form uploads (via a temp URL perhaps?).

This would replace my current workflow...often I find myself receiving a set of images in gmail, downloading them, performing trivial manipulation with Windows photo editor or paintbrush, saving the results with sensible encoding/quality (some ppl forward me bitmaps...) then re-uploading the results.