The iOS 4-compatible apps continue to roll-in. The latest is Foursquare which now includes fast app switching and high resolution artwork for the iPhone 4′s retina display.

We’ve written a great deal about whales, or those users that spend most heavily on social games. Usually whales are defined as people who spend over $1,000 in virtual goods, of whom a handful will spend tens of thousands of dollars. However, these $1,000 whales are relatively rare.

The International Medical Corps, a global non-profit providing health care training and development programs, is currently competing for votes to win $200,000 in the American Express-TakePart Members Project online campaign, and it has streamlined its social media fundraising efforts into one Facebook application to do so.

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Google is now in the flight information business. The search giant just announced it is paying $700 million in cash for ITA Software , an essential provider of flight information to airlines, travel agencies, and online reservation systems. ITA raised a massive $100 million series A back in 2006 from Sequoia, Battery Ventures, and General Catalyst.

Analytics giant comScore has just acquired the products division of Nexius, a mobile analytics and data networking compant. Nexius’ products provide analytics that mobile operators can use understand consumer behavior, and to build better networks and experiences

Tesla unveiled its newest electric sports car today, the Roadster 2.5 , just two days after its IPO . The Roadster 2.0 was released only a year ago, and existing customers will be able to buy upgrades to 2.5 features where feasible. Pricing starts at $101,500 after a federal tax credit of $7,500.

Mixpanel , an analytics-focused startup whose backers include Y Combinator, Michael Birch , and Max Levchin , has hit a big milestone: it’s now processing over 1 billion actions per month. To put that in perspective, a year ago the company had recorded 80 million actions cumulatively

In a trend that started this spring , many of the 25 largest Facebook social games continued to lose users through the end of May and on through last month. But there was some growth.

iTunes in the cloud. We all know it’s coming, it’s just a question of when, and with what capabilities? A story from Boy Genius Report today appears to answer at least one of those questions, and vaguely answers the other.