Preloadr is a free service providing image manipulation functions linked with your Flickr account. It is designed to pre-process photos uploaded to Flickr. It can do “Graduation Curve, Histogram, Layers and more like pros do” (yeah, I don’t know what all that means either). It describes itself as “The best way to upload and optimize photos to Flickr. Better colors, better sharpness, better contrast.” I didn’t actually give it a try, but the demo images on the front page do look impressive. It’s not clear what their revenue model is, but their logo has it labelled as “early”, so maybe the revenue-generation will come later.