It looks like Nissan has sent out some updated emails to select markets. I received mine the morning of 5/17/2010 with the following text
Chris, thank you for reserving a Nissan LEAF™. you live in an area that will be one of the first to start the order process, which begins in August and continues for the next few months. during this time, you’ll be notified when to contact your dealer. together, you will confirm your options, and talk about price, trade-ins and any incentives that are available.