Microsoft has released a OneNote app for iOS, designed to sync with the company's OneNote software, which is a part of Microsoft Office for Windows and has a web version that Mac users can take advantage of.
The OneNote app allows you to create notes and sync them with the Windows Live SkyDrive cloud storage. The app will allow use of the iPhone's camera to add pictures to your notes, but doesn't have all the features of its web-based sibling or the Windows desktop version. As Macworld points out, some of those advanced features will not sync to the iPhone app.
