Product art as seen in Photoshop CS2. Click to view larger image.

What's the upside of this solution you might ask? First, unlike printed packaging (boxes) the plastic cases are not product specific until the product artwork is fixed to it, so printing costs are lower. Second, the plastic cases are very inexpensive compared to a printed solution. And third, they are very durable and look very nice. So a developer who ships multiple products can simply slip the required artwork into the sleeve and presto, product specific packaging.
The down-side is that you are using a petroleum product which isn't always recyclable. But given that these cases look good and will protect your investment, they may not be as quick to find their way into the local landfill.