Along time ago on another thread, I mentioned the possibility of putting a 2" receiver on the Solstice so you could put any number of storage devices on the back or tow a trailer. At the time no one seemed to think that was to good of an idea. I personaly don't need a lot of storage space, and I'm sure I'll get by with the 2/4 cubic feet, so I won't be doing it, but I thought it might work out for all those who seem real concerned about stowage.
The receiver could be covered with a panel and not be visable when not in use. You would have to crawl around under the car to hook up, but that's the price you would have to pay to keep the back side looking clean. Just an idea.