GM has announced that a Solstice Coupe will most certainly be following up on the narrow footprint of the Solstice Convertible. They will also be working on some revisions to the 4 cylinder engine to increase the horsepower flowing through their little pocket-rocket. The new coupe will be reaching the auto market in 2009, while plans are already begun for a total reworking of the Solstice design by 2011.
Maybe since there will be no convertible top taking up space behind the two seats of the Solstice Coupe there may actually be enough room in there for a suitcase. That might ofcourse be too much to expect, but maybe enough room for a day-bag would be a good start.