One suggestion is to use Jing with screencast.com. Both free, although you do need to sign in to Screencast. I use this EVERY DAY at work. (I do internet content writing.). It's a screen capture program, but it's very intuitive and works extremely well. It's not photobucket, but it's a good FREE alternative that definitely does the job.
Here's a cut and paste from screencast.com (Gee, wonder why I picked this one....?)