Roundup: A bevy of iPhone news, HP to green data centers with manure, and more

Here’s the latest action:

Jive names new CEO on way to IPO — Jive Software, maker of Web-based collaboration software for enterprises, has just named Tony Zingale, the former CEO of Mercury interactive, as its new chief executive officer. It has also moved its headquarters to Palo Alto, Calif., as it bulks up in preparation for a potential initial public offering.

Visa unveils case that turns your iPhone into a credit card — Out of the recent partnership between Visa and DeviceFidelity has come a new iPhone case called the In2Pay that plugs into the bottom of your handset via its dock connector. Paired with the requisite payment app in the Apple App Store, the case lets you scan your phone to pay for things, just like a credit card.

Twitter launches official app on the iPhone — Twitter has finally brought its official client to the Apple App Store, replacing Tweetie 2. It is now simply called Twitter, and is listed as version 3.0 of the application.

Sprint wants to ditch the Pre for the iPhone — Sprint CFO Robert Brust let slip that the carrier is dissatisfied with its experience with the Palm Pre, and is still very interested in supporting the iPhone, if only its exclusivity deal with AT&T would end.

Is AT&T open to tethering? — With the newest version of the iPhone OS 4.0 Beta 4 offering tethering, it looks like the previous reluctant carrier is now embracing tethering.

HP wants to run data centers on cow poop — Hewlett-Packard aired research today demonstrating how data centers could realistically power their servers with methane generated by cow manure. In turn, the heat released by data centers could be recycled into electricity for farms.

Google intros contextual gadgets for Gmail — The search giant has launched a new API for Gmail allowing Google Marketplace apps to relay information to users within the Gmail interface. For example, mail users can now view relevant information about YouTube videos, Google Docs and Picasa photos.

Google goes head to head with Amazon S3 — The search engine may use its I/O conference in San Francisco this week to announce a cloud storage offering that could compete directly with Amazon’s S3 product. TechCrunch has more.