Recently, we launched a feature that allows you to drag an attachment from your computer right onto Gmail.
I've always been a fan of the inserting image lab, so I naturally wondered if it would be possible to combine the two.
Today we're launching a feature that allows you to drag images from your computer into a message. You don't have to have the insert image lab enabled for it to work. Just drag the image in, resize it if you want, and send.
Drag images into messages - Official Gmail Blog