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Boo!: -Internal, non-user replaceable battery -no bundled superdrive/cd/dvd drive (external, optional)* -micro-DVI output can only display on (up to) 24-inch monitors -the only supposedly input will be the single usb port. duh. -no RJ-45 port. (no ethernet! optional usb adapter, 20-something dollars)
*The latest Apple hoo-ha is the Remote Disc. One has to carry around CD/DVDs and expect another person or place to have a MAC/PC with a CD/DVD drive, stick one's optical media into that drive and wait for it to wirelessly sync with the MacBook Air. Provided that the host machine IS enabled for wireless communication over compatible protocols (wireless-n or bluetooth). The hassle.
and lastly. $1800! and that's the base model, get all available, internal options (1.8GHz processor, 64GB SSD) and that's +$1000 more! For a grand total of $3,098.
complete specs
1.6GHz Intel Core 2 Duo 4MB shared L2 cache Option: 1.8GHz Intel Core 2 Duo