By default, the About Me box is just a gray rectangle with nothing inside. I've been using Stack Overflow for 6 months and always assumed it was an ad that was blocked by AdBlock. Today I learned that it is, in fact, the "About Me" box.
In order to incite users to fill in this information (or simply to let them know what this box is used for), shouldn't there be some link text in the box?
For example, if the About Me info box is left empty, then add add some discreet link such as:
The link should be in a small font and discreet color so that's it's not in your face, but the presence of some explanatory text would be useful for those wondering what this box is all about.