Have you ever had the need to host an image so that you could reference it somewhere you were unable to provide an image, such as a forum? 

I sure have.  I can't tell you how many times I wanted to share a screenshot of something bizarre happening in some application I was using.  Typically, I am trying to post a message to a message board, or forum and want to provide a URL to the image.  But, where to post the image?

ImageShack to the rescue.  This free image hosting service is available for just this purpose.  Be sure to create a free account so you can get back to images you have previously uploaded.  Here is a link to ImageShack.