The world was fairly certain that the latest generation of iPod nano had ditched its squat appearance for another growth spurt, but today in San Francisco, Steve Jobs confirmed the rumor as fact on stage: The fourth generation iPod nano is indeed skinny again and it features an accelerometer. Innovation or identity crisis, here are the complete details on the device that's available now:

Form Factor
The new nano is tall like the original nano, but it's also curved like the iPhone. Available in 9 colors (silver, gunmetal, purple, blue, green, yellow, orange, red and pink.)

Storage/Pricing
The entire nano line has been bumped in storage under the same price points we already know, now supporting 8GB for $150 and 16GB for $199.

Voice Recorder
Woo! (Scroll down, appears to be in headphones)

Control
Integrated accelerometer notices landscape mode for Cover Flow, photos and video, and it allows the nano to be shaken to shuffle a random track. Holding the center button during a song brings up the Genius menu.

Battery Life
24 hours of music, 4 hours of video. Sounds similar to the old nano.

New Headphones
Include micro remote and microphone.

Green
The new nano is arsenic-free , bfr-free, mercury free, pvc free, and "highly recyclable."

Send an email to Mark Wilson, the author of this post, at mark@gizmodo.com.