Here’s the latest action:

AdMob serves 200 billionth ad — Less than a year after hitting the 100 billion milestone, the advertising network has doubled its count, in addition to announcing its sale to Google, and releasing several other upgrades.

Flash vs. HTML5? — Apple CEO says there’s no reason to depend on Flash when HTML5 offers supreme video capabilities, but Adobe says not so fast… All Things D tries to untangle the issue.

Apple takes aim at Google with new patent filing — The iPhone maker has filed a patent to have data and applications loaded onto users’ handsets automatically based on their locations. Analysts see the company going after Google’s location advertising market.

MIT awards nano-engineered cement — C-Crete Technologies was selected as the winner of the $100,000 prize in MIT’s annual Entrepreneurship Competition. The company’s product minimizes carbon dioxide emissions. Cnet reviewed the other winners too.

Wal-Mart to sell iPad — The major retailer may start selling Apple’s tablet at some of its locations in order to make its electronics offerings more competitive with its big box peers like Best Buy.

A peek at the BlackBerry tablet — Boy Genius Report got an exclusive glance at the forthcoming BlackBerry tablet’s specs, including the fact that it will rely on a Bluetooth connection or built-in Wi-Fi. Check the site for more.

Celebrities forced to follow you — When a Twitter bug struck earlier this week, suddenly users were able to force any other members of the micro-blogging service to follow them — including many celebrities. Oprah, Lady Gaga and Justin Bieber topped the list of unwilling followers.

Wikipedia gets a new look — The online encyclopedia has redesigned its interface based on extensive focus group studies. The Wikimedia Foundation wanted to make the editing tools more easily accessible, and the whole site more intuitive to navigate.

Gates funds artificial cloud project — It appears that Microsoft founder Bill Gates is sinking $4.5 million into artificial cloud technology that could potentially be used to cool the atmosphere. Earth2Tech has more.

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