Here are the news that you will only read on AutoSpies. Pontiac will bring the Wave, a rebadge of the Chevrolet Aveo. It is already sold in Canada.
http://www.gmcanada.com/english/vehicles/pontiac/wave/index.jsp
Chevrolet will also sell the Optra, the U.S. Suzuki Forenza, already sold in Canada.
http://www.gmcanada.com/english/vehicles/chevrolet/optra/index.jsp
I discovered this while looking at the 2007 EPA fuel ratings on fueleconomy.gov, so it is official.