Along with the announcement about the launch of OneDrive, Microsoft also announced a huge giveaway that will happen today. Microsoft is planning to give 100,000 people 100 GB of free storage for 1 year on OneDrive. OneDrive’s Twitter account will give clues about other details on how to take part in this giveaway, etc,.
To celebrate the official launch of OneDrive, today we will also give 100,000 people 100 GB of free storage for 1 year. That’s 10 PB of free storage—enough storage space for a photo of everyone on the planet. If you want to be one of those 100,000, keep an eye on @OneDrive for clues.
Update: Use http://OneDrive.com now and get 100GB bonus storage for a year for free
Source: OneDrive Blog