Drag and drop in Gmail

Well, I'm probably one of the last gmail users that see's it but I just a moment ago encountered that Gmail supports drag and drop.  One of the things I really missed. When I wanted to move mails to a label I had to do it using the 'move-to' poplist. But apparently sometime in the past months google implemented the possibility to grab one of more mails/conversations and drag them to a label. Great. By this the frontend mimics a rich-mail-client as Thunderbird., so that handling mail using Gmail is much more convenient. I love empty mailboxes...