iPhone users can now download Microsoft OneNote Mobile for iPhone from the iTunes App Store, and it's free for a limited time.
OneNote is a digital notebook, much like a digital file cabinet for all the random bits of information that are too hard to keep track of in your head.
OneNote Mobile for the iPhone lets you capture and review notes and lists on your phone.
Notes are automatically backed up and synced with free Windows Live SkyDrive online storage, so that you can access them from virtually anywhere.