There is a smart forum at..
Smart Car of America - Smart Car Fortwo Forums
You can make a reservation at a dealer location - or - you can do it on the internet.
They started selling the cars in the US in January, but the $99 reservation system has been in place for over a year. The wait is now between 12 - 24 months depending on your zip code. Once you make a reservation you get a reservation number. Your reservation is based on that number and your email address until you "confirm & configure". This is when you finalize the model choice, color & options. A day or so after that you receive an email with your confirmation ID and password. This is also when you are assigned a dealer location. Once you are configured you can use the DDE (Due date estimator) to check your time frame to expect delivery. When it gets close to delivery you get your VIN number and you can communicate (sometimes successfully) with the local dealer on the actual date.
I ordered in January 08, Configured in April and my DD Estimate is January - March 09.
The orphan list is for people who aren't particular about what model/color they get, so the wait can be as little as a few weeks (so I've heard on the above mentioned forum).