The Verge has a post on the privacy terms of Dropbox, Skydrive, Google Drive and Apple.
http://www.theverge.com/2012/4/25/29...dropbox-icloud
It seems that Google's terms are more or less in line with other cloud service providers.
On the other hand, Apple "reserves the right to determine whether Content is appropriate, and may pre-screen, move, refuse, modify and/or remove Content at any time, without prior notice and in its sole discretion, if such Content is found to be in violation of this Agreement or is otherwise objectionable"