it seems a lot of people are having trouble with this since that other site sucks now.
1. Go to imgur.com
2. Sign up
3. Click on your screen name and select "images" then select "add images"
4. Select browse and find the image you want to upload
5. a thumbnail of your image will show up. Click on the image of your choice. the image will expand and give you a bunch of options, click "direct link" and copy it
6. go back to A.O. and and create a post to show everyone your cool picture (Press this button)
7. this prompt will show up. Paste your direct link
8. it will spit out the img stuff and your picture will show up.
like this one
now please stop using photobucket