On May 6, 2007, I reserved a silver/silver pure. On December 15, 2007, I was given the chance to confirm a white/silver/red passion w/heated seats, theft alarm and smart sound system. And that's what I have.
If changes are made (i.e. 2009 or 2010 models: colors, options, price...) my understanding is that one will be given the chance to fine tune one's order (even after the configuration/confirmation process) or bail out.
Hope it helps, Larry?