Tried to upload to imgur but I think you need an account. Any IMG hosts that don't? Imageshack has long since turned to the dark side.
Thanks. I tried with different browser and it worked.
Off-topic, but I don't believe you need an account to upload to imgur. Honestly the only reason I use it is because it's the first site that pops into my head when I need to do a quick, no-fuss image upload where the link won't break anytime soon due to bandwidth limits a-la photobucket and friends.