Along with the released of Apple newest operating system iOS 5 for iPhones and iPad, Apple released iCloud as well.
The service allows users to store data such as music files on remote computer servers for download to multiple devices such as iPhones, iPods, iPads, and personal computers running Mac OS X or Microsoft Windows. It also replaces Apple's MobileMe program acting as a data syncing center for email, contacts, calendars, bookmarks, notes, to-do lists, and other data. iCloud is free to anyone with an iOS 5 device and also available for Mac user with OS X Lion.
Find My iPhone allows your to locate your iPhone on a map. This is designed to recover or any scenario, it erase or lock your iOS device if its lost or stolen. It is also useful if you've misplaced your iPhone at home.
All iCloud users get 5GB of free storage, if this isn't enough you can buy more storage which cost $20 for 10Gb per year, $40 for 20GB per year and $100 for 50Gb per year. That's costly enough to get more storage if your not that satisfied with iCloud.
For iOS users, the syncing aspect of contacts and calendars is fantastic. It automatically back up your camera roll, accounts, documents and settings when your devices (iPhone, iPad, ipod touch) is connected to wi-fi.
Photo Stream is an iCloud service that allows users to store the most recent 1,000 photos on the iCloud servers up to 30 days for free. When a photo is taken on a device with Photo Stream enabled, it is automatically uploads new photos to iCloud and downloads them to all of your devices when connected to wi-fi. From there, it is automatically pushed to the rest of the user's registered device. You can get your photos from your iPhone and ipad instantly to your Mac or pc without emailing it to yourself.
iCloud can also store documents and data files. Users can choose to backup their iOS devices, including app data, to iCloud via wi-fi, just like plugging your devices to your Mac or pc with the use of iTunes for back up.
iCloud Control Panel for Windows
The iCloud Control Panel is required to use Photo Stream, Contacts and Calendars (Microsoft Outlook 2007 or later required).