I love dropbox and I actually think Google Docs is not ‘alf bad either. But both terms of service are pretty scary.
Dropbox scalls itself “Secure backup sync, and sharing”. However, buried deep in the T&Cs, it also says “Business Transfers. Dropbox may sell, transfer or otherwise share some or all of its assets, including your Personal Information, in connection with a merger, acquisition, reorganization or sale of assets or in the event of bankruptcy”
Google Docs terms states “… you grant Google a worldwide, non-exclusive, royalty-free license to reproduce, adapt, modify, publish and distribute such Content on Google services for the purpose of displaying, distributing and promoting Google services…”