The most awesome and potentially expensive car configurator you'll see today is the Veyron 16.4 Configurator. If you're at all into cars (or even have a passing acquaintance with them via something like Top Gear) you'll know of the Bugatti Veyron. In the configurator you can set up the options, colors, etc. Pretty awesome. Note that there aren't prices associated with these, cause I think if you're looking at the Veyron you're the kind of person who doesn't pay attention to prices (or sites like this one either).
Here's my configuration (pdf) if anyone is feeling generous this Christmas.