That's clever marketing for you. I can't quite work out the criteria for receiving one of the email invites though. Who exactly got the chance?
Looks like this is now available to the general public: http://www.google.com/appserve/mkt/fLywFqIiikceBrWe can't say we expected Gilt to be the first place to offer Samsung's new Chromebook but, well, here we are. Google's now sending out emails like the one above to at least some folks that were a part of the Cr-48 pilot program, telling them that they can join a "limited time" sale on the high-end discount site starting today, June 1st. In true Gilt fashion, the Chromebook (otherwise known as the Samsung Series 5) will also come paired with a "limited edition" sleeve designed by Rickshaw. Unfortunately, "limited" seems to be the keyword here -- the sale is only open to those that have received the email, and it's not clear how many Chromebooks are actually available.