Another example that uses it is: http://mysticpaste.com
Just get an image in your clipboard and paste in the box
For what it's worth, it seems like a lot of the other players in this space have gotten popular by providing tutorials for usage with Rails, PHP, etc.
Might be worth a few paragraphs.
After dragging a file to the drop board, I couldn't remove it (FF18 OSX10.7).
It would be nice if I could drag off as loading the wrong file seems to require a page refresh to undo.
Old browsers can default to a normal form input.
EDIT: PS: I also chose jQuery over any other lib just because it's the most wide spread. Personally I have worked with Ender, Component, RequireJS and don't use jQuery in all my projects.
That said, it does abstract much of the crap that goes along with XMLHttpRequests and all the cross-browser idiosyncrasies that go along with it.
I'd say at this point it's a matter of personal preference and performance requirements.
Does anyone know why this is? I had the same issue with jQuery-File-Upload.
If so, great to know that there's a fix!
I realized that there's nothing really fancy going on when uploading to S3. That's only true since Amazon added CORS support. Just add a few hidden form fields and you're good to go.
Properly populating those fields can be a bit tricky, however. This gem will does a great job and should give you a head start: https://github.com/waynehoover/s3_direct_upload