Available to pro only. Simply drag & drop your assets into JS Bin and it'll upload instantly and insert an image tag with your newly uploaded asset.
Each pro user can host up to 1GB of assets - so that gives you a bit of freedom to sling up your images as quickly as you create bins.
To manage your assets, head over to the assets account page and you can delete files and check your usage.
Uploading non-image assets
Navigate to the assets page and drag the file directly in to the browser window. This asset (such as a CSS file) can be now re-used inside of your bins.
You can see a demo of upload in action below: