People pronounced the Nexus One dead and that you would be able to get another one. Some panicked and the Nexus One became available as a developer phone but quickly ran out of stock. Others officially pronounced the Nexus as dead. According to the site it looks like there is a limited supply back in stock for registered developers to purchase. Or like some just do to just be able to purchase and use to taunt those non-developers who aren't so privileged and lost their opportunity to buy an unlocked Nexus One from Google back when they shut down the general phone web store.
For all those that really want a Nexus One for. I would recommend you hurry and get one while they are in stock… Its no telling when you will be reading "out of stock…AGAIN!"