Well it depends on what you'll be doing with the pictures after uploading. I use imgur too, they have a problem with celebrity leaks but I uploaded the original leaks there back on August 31st and still haven't been removed because I keep the links pretty private (maybe couple of hundred of hits). If you expect it to get a lot of hits and the images are of celebrities, they will be taken down. Maybe Ill get a script running so you guys can upload photos here but for now you can try
http://www.imagebam.com/ I've never personally used them but I did see other people use them with success.