It is critical that the core experience of real-time introductions and information is protected for the user and with an eye toward long-term success for all advertisers, users and the Twitter ecosystem. For this reason, aside from Promoted Tweets, we will not allow any third party to inject paid tweets into a timeline on any service that leverages the Twitter API.

A major blow for quite a few developers, I would imagine.

⁋

Ridiculous to charge for API use if you want developers to bite. The article sums things up pretty well:

All of this is a shame, because the API appears like it could be useful. But Wolfram is over-promising what Alpha can deliver and setting a financial bar too high for general use.

⁋

Google has added experimental OCR support to their Documents List Data API. A live demo of the service is also available.

(via the Google Data APIs Blog)