Arthur Alves appears to have got frustrated with checking multiple different sites for stocks of the Pi Zero, so he built a stock tracker website. The system checks and displays whether stock is available at CPC, Pimoroni, The Pi Hut, Adafruit and Element 14. Pretty nifty, and highly useful! Visit the site here.
The Pi Zero remains stubbornly difficult to get hold of. Liz Upton previously posted on the Raspberry Pi Forum about the stock release schedule (although I’m not sure if they’ve managed to stick to that, what with the success of the Raspberry Pi 3) and Eben has gone on record as saying that Raspberry Pi Trading has ordered up to 150k Zeros. When these will be delivered is open to speculation, of course. 🙂