I am working on a site, which displays statistical data about computers (disk, usage, etc...) and there is a web page, which consists of three columns: two smaller on the side, and a large one in the middle.
The right (small) column is a menu, which allows me to add a computer, modify settings, etc...
The left (small) column shows the list of computers, and the user can click on them, to display their usage statistics in the middle frame (the large column).
When the page initially loads up, the left and the right columns are populated but the middle one stays empty, and I think that I should display something there, to not to show the user a big empty nothingness.
What is your opinion, what should I put in the middle frame on page loading?