Microsoft is sponsoring the first-ever “Mobile Incubation Week” to help startups incubate outstanding ideas. The first event will be held at Microsoft’s Silicon Valley Campus in Mountain View, CA April 13-17. Other events are being scheduled to follow in Europe and Asia. Selected participants will have a chance to show off their apps and get them certified for Windows Marketplace for Mobile. From an initial applicant pool of 50, Microsoft has narrowed Its WinMobile Incubation Idol competition to six finalists, according to Brian Hoskins.