A new Raspberry Pi Zero board appeared on Twitter
Short
From the new only small size and inconvenient ports (mini-HDMI and USB-OTG) plus the absence of connectors for flat cables of the camera, display, audio. The video connector is now in the form of unsoldered pyataks. Cost $ 5.
In detail

Dimensions: 65mm x 30mm
Weight: 9 g
Processor: BCM2835 with VC4 (yes, back to the old, albeit at a higher frequency, about 40% faster than RPi 1)
CPU frequency default: 1GHz
Memory: 512MB RAM
Power Consumption: 0.5-0.7W (100-140mA at 5.09V)
Compared to RPi 2B version

Pibow does not sleep
