Darrell Etherington at GigaOM:

The threats accuse devs of patent infringement regarding Appleā€™s in-app purchase mechanism, but the patent holder appears to be targeting independent developers individually instead of going after Apple itself.

Hopefully Apple steps up to help their 3rd-party developers. In the meantime, as Marco suggests, the rest of us can buy pCalc to help James Thomson out.

Indie Devs Threatened by Lodsys Over In-App Purchases