You can already buy the Nintendo DS Lite at some Wal-Mart and Target stores around the United States.
The Nintendo DS Lite doesn't officially go on sale in North America until June 11th, but some gamers already have their hands on the system -- without importing. Someone named Trakan at Cheap Ass Gamer reported buying a DS Lite on Tuesday after seeing them in the display case at his local Wal-Mart store. Other users of the site have since confirmed that they too were able to purchase the system at various Wal-Mart and Target locations around the U.S., although many stores are still not selling the Lite. It also seems that some mall stores are willing to sell the system as soon as their shipment arrives, which is expected as early as Wednesday.
Street dates are rarely broken in the video game industry, and it remains to be seen how other retailers will respond. Check with your local stores, in person if possible, to see if they have the systems in stock and are willing to sell them now.