The app was already on Windows Phone 7.
Onit aggregates male-oriented content (think science, history, sex, cars, beer, etc.) from content sources including MSN, Esquire, LIFE.com, Men’s Health and TheSmokingJacket.com, and adds Bing searching and Facebook sharing. More info on the MSN blog.
Other recent iOS apps from Microsoft include Photosynth and the OneNote note-taking application. (OneNote also debuted first on Windows Phone.) The company’s Bing search app for iPhone also has been getting frequent updates.
Here’s the link to download the Onit app from the Apple App Store.