I use Kodak Gallery. The upload time is a bit slow, but I think you can make it faster somehow with firefox. I need to have my brother explain it to me!
I really like the way you can orginize albums and I have ordered prints from them before and I'm always VERY happy with the printing!
My cousin and I are both Nikon dslr photography freaks and we both recomend Kodakgallery.com! She has tons more albums than I do but I just got my D80 so I will have to try to keep up!