I'll start by introducing myself, I'm Cloudguy, a wiki editor who's been working on wiki's for about 2 years, my main site is ComicVine.
Well as my first blog I've decided to share what the websites I've been using to store all of my images online rather than have them all stored on my pc. It also helps having them on a database because if something happens to your pc you've lost all of your images and work, and in case something happens to the website you're on, you won't have to re-edit all the images you've made.
Imgur is a social networking site that allows you to upload images worldwide, I mainly use it to save all of my images I've worked with so I can find them easily and to save space on my computer. Although I think it does have an upload limit (it might be a post limit though) Imgur allows you to organize folders, name each image and describe them for even more organization.
2. Photobucket
Photobucket allows you to upload an unlimited amount of pictures, they also allow you to get them printed, at a cost obviously.
3. Google+
Google+ takes a bit of time to make your images private but allows you to upload an unlimited amount of images.