You don't even need an account to upload images. Start at this link:
http://imgur.com
In the
Upload images section click the
Computer button. A dialog box should open to let you navigate to the image file location on your computer. After selecting it, a new section on the main imgur page should appear with a
Start Upload button - click it.
Once uploaded a new page should appear with the image on the left and a list of links on the right
1. For DU3 use the
Direct Link - click the little page icon by the image address to copy it to your clipboard and then when you are composing your DU3 post hit Ctrl+V to paste the image address where you would like the image to appear. No special html tags are required - when the DU3 software sees a link to an image it should automatically display that image in your post.
The address that goes in your post should look something like this:
http://i.imgur.com/k1sDT.jpg
1 There is also a deletion link below all the other image links on the right hand side of the page - be sure to copy and save that if you might ever want to delete the image from their servers.