With the "Amazon Appstore for Android In-App Purchasing Beta Request Form," developers can sign up for the in-app purchasing beta SDK. It's invite-only, for now, and you have to answer a few questions, including:
- Name and e-mail (natch), plus a company name.
- Whether you're a current member of the Amazon Appstore Developer Program. And if so, how many apps you've submitted.
- Whether you've used Google Checkout, PayPal, iOS or some other form of in-app billing.
- The current number of apps you have that include in-app billing.
- The kinds of in-app content you currently offer.
- What kinds of apps you develop.
- What kinds of devices you offer. (Interestingly, there are three choices -- handsets, tablets and Kindle Fire. That shows how Amazon's treating its product, no?)