Box.net is offering iOS users 50 GB of free cloud storage.
The promotion started on Wednesday and runs for 50 days (that's a December 1st end date). It increases Box' normal 5 GB free account to 50 GB and file upload sizes to 100 MB vs. the usual 25 MB.
The deal is open to current and new Box.net account holders that download or update to the latest 2.4.3 version of Box' iPhone / iPad app.
More info in Box' blog post.