Ok, so I may be the last person on the planet to have heard about Picnik.
Just in case you haven't either-- check it out. It is seriously the coolest photo editor I've seen.
And it's free.
I've been lamenting the fact that I don't have a fancy photo editor for a while now, but no more. Here's me playing around with all the stickers. Also, new blog header a la Picnik.