Image Twist isn't looking to reinvent the wheel when it comes to helping you get your photo content out there, but what it does do is offer a stable platform that's easy to use and offers free storage of the material you put on there.
The positives include the fact that you can select images up to 4 Megabytes in size, they have a policy that is fine with adult material and you can even earn money when you share the files you have on offer. It also has a Flash upload feature if you want to get your content out there as quick as possible! Oh, you can also paste URLs of file locations that you want to be backed up: it's pretty neat.
Note that Image Twist does have a few adverts dotted around the place and if you want to have the fastest loading available, you will have to pay a little extra cash for their Tier 1 and Tier 2 services. It's not much, but you may want to stick to other hosts if load times are important and you don't have cash to spare.