During this morning’s MacWorld keynote, Steve Jobs announced the new MacBook Air notebook. We’ve all been expecting some sort of Apple sub-notebook, and this one looks amazing. Apple it touting this as the “world’s thinnest notebook”. The MacBook Air is 0.16-inches to 0.76-inches. The thickest part of the Air is thinner than the thinnest part of a Sony TZ series notebook. That is impressive. The device features an 80 GB 1.8-inch hard drive, with a 64 GB SSD drive as an option. It ships standard with 2 GB of RAM and a 1.6 GHz Intel Core 2 Duo chip, with the option to switch to 1.8 GHz. Other features include a 45-watt MagSafe, 1 USB 2.0 port, a Micro-DVI port, and audio out. There is no Ethernet port (otherwise they couldn’t have gotten it this thin) so you will have to rely on the built-in 802.11n WiFI and Bluetooth 2.1+EDR. The MacBook Air also leaves out the optical drive, but you can purchase an external SuperDrive accessory for $99 USD. It also ships with software that allows it to “borrow” the optical drive of another Mac or PC. Expect 5 hours of battery life out of this one - or more if you opt for the SSD drive. The MacBook Air will hit retail in about two weeks, and will cost $1799. Pre-orders start today.