FTA: "At the heart of the Dash is a USI (Avnet) 850101. The 850101 is a combination wireless module (Broadcom BCM43362) and micro controller (ST Microelectronics STM32F205). This makes the Dash capable of connecting to 802.11 b/g/n networks with its 120MHz ARM Cortex-M3 processor. It also happens to be exactly the same chip used inside the $19 Spark Photon."

Avnet USI is just repackaging the chipset on behalf of ST and Broadcom. Honestly, there are other things you can order today if you don't want to wait for this one. You could try adafruit, sparkfun, or even digikey.

I personally recommend the modules from LS Research.

Module: http://www.digikey.com/product-detail/en/450-0064/450-0064-N...

Eval/Breakout board + Module: http://www.digikey.com/product-detail/en/450-0120/450-0120-N...

You'd need to add power, a button, and some code to replicate the Dash. Dash is really a super simple device.