Now after an update on the 17th the app is once again available for download.
The Paypal Here device and service offers a secure and easy-to-use mobile business app with back-office management and Point of Sale, and allows users to start accepting credit and debit card payments in person and on the go.
It features a 2.7% transaction fee per card swipe and otherwise no monthly fees.
The service remains US-only at present and the app can be downloaded from the Windows Phone Store here.
Thanks Jan for the tip.