The site seems to be struggling--some images take forever to load and some of its functions don't work. Maybe they got flooded by inviting all the social news people.
I'm gonna try compressing and uploading my pictures (just <2GB) then downloading them to test out their transfer speeds. There's a 5GB filesize limit which is nice. If it's fast enough it will probably replace Gmail drafts as my filetransfer of choice. I'll post with the results when done.