The Onion Omega2 is a tiny little computer that only costs $5 - The Verge
Omega2: $5 Linux Computer with Wi-Fi, Made for IoT by Onion — Kickstarter
Omega2: $5 Linux Computer with Wi-Fi, Made for IoT | Indiegogo
Onion – Invention Platform for IoT
Products – Onion
This Week in Google 387 Mommy's Special Shawl | TWiT
Onion Creates a $5 Linux Computer with Wi-Fi, Designed for IoT Applications @ InfoQ
8 superb -- and cheap -- Raspberry Pi alternatives @betanews
"coin-sized Linux computer/fully functional wireless router last week. It’s a cube-shaped device that comes packed with ports, including Ethernet, USB 2.0, microSD slot, and audio jack. You can read more about it here. The full VoCore2 costs just $11.99, but there’s a Lite version priced at just $3.99."
You can get one by pledging on Indiegogo now. Shipping is due to begin next month.