That is the claim made by the Box.net service: For the next 50 days they are giving 50GB of storage to anyone who signs up for a free account and downloads/logs in with the IOS app:
Box is clearly trying to tap the iPad and iPhone 4S wave, but you don't have to own one of these devices to get a 50GB account. You only need to log in on an IOS device once to qualify for the space - Android users can borrow a friend's iPhone or iPad and login one time with their account.
The downside? Their equivalent to the Dropbox fantastic file sync software is only available to the for-pay accounts. The free account is still useful through the web interface.
The upside? Who couldn't use 50GB of access-anywhere storage?