Rumors told us what when and even how much to expect, but Google just made it official on stage -- Chrome OS netbooks are finally here, and Samsung is leading the way with a ultra-slim 0.79-inch thin machine. This is the Samsung Series 5 ChromeBook, which plays to Google's new standard "Chromebook" spec --in short means they'll each come with a dual-core Intel Atom processor and an "all-day" battery, which Google says will provide 8.5 hours of continuous usage here. Samsung's particular clamshell will have a 12.1-inch, 1280 x 800, 300 nit screen, weigh 3.26 pounds and come with dual-band 802.11 WiFi, optional global 3G, two USB 2.0 ports, an HD webcam and a clickable trackpad that Google tells us has thankfully been revamped since the CR-48 . You'll be able to order one from Amazon or Best Buy beginning June 15th. It'll cost $429 for the WiFi version and $499 for worldwide 3G -- which includes 100MB of free Verizon data per month , just like the CR-48. PR after the break.Amazon's Series 5 listing details some additional specs -- we're looking at a dual-core 1.66GHz Intel Atom N570 chip, a 1 megapixel webcam, and a 16GB mSATA solid state drive here, as well as an SDXC card reader, and VGA-out via an "optional" dongle. The press release also mentions a Li-ion battery good for 1,000 recharge cycles, though it doesn't mention what efficiency will be like after that.