Include a publishing tab that includes all of the major upload sites such as Image Shack, Photobucket and Picasa Web Album (which has recently announced unlimited storage for it's users) as well as social sites like Facebook

A publishing tab would enable you to quickly upload your images to your favorite sites rather than having to faff around. Include your log on details so that it is automatically done once you've decided where you want it uploaded to, or even enable it to upload to all that you select automatically.