SugarSync 3.0 has been announced for for iPad. The app is free, but you’ll have to pay if you need more storage than the basic free 5GB service storage.
SugarSync is a free service that enables you to access, sync and share your files across all your computers and devices.
SugarSync will enable you to backup, sync and share all of your documents, photos, music and movies so that you can access them from your laptop, iPhone, iPad, Android, BlackBerry, or any other device. – https://www.sugarsync.com/