Do you use Dropbox? Have you read their new recently changed TOS? The following quote is from their “Your Stuff & Your Privacy” section and seems to me to have some far reaching implications that could cause some users major legal trouble. Particularly the last sentence of the quote. Think about that and the stuff you have in your folders. Additionally, the bulk of the statement regarding granting them sublicenseable rights undoubtedly relates to them making your data visible to you and those you share your information with. I suspect that this is with the best of intentions and results in broad language recommended by lawyers but, it is not restricted in any way. So the result is that it matters not what their intentions for your “stuff” are. They can do what they want with it. Just imagine if Facebook buys Dropbox at some point.

My opinion is, be informed and be cautious. It’s ok to use these services but only once you understand the consequences of doing so.

We sometimes need your permission to do what you ask us to do with your stuff (for example, hosting, making public, or sharing your files). By submitting your stuff to the Services, you grant us (and those we work with to provide the Services) worldwide, non-exclusive, royalty-free, sublicenseable rights to use, copy, distribute, prepare derivative works (such as translations or format conversions) of, perform, or publicly display that stuff to the extent we think it necessary for the Service. You must ensure you have the rights you need to grant us that permission.