I really like (even though it is an extra step now and then) two-step authentication! It is now available on Dropbox and you should really connect it now. Details from Lifehacker:
Dropbox just announced the beta version of its two-step authentication yesterday, but it’s now available for everyone. To enable it, you need to head to your Dropbox account, click the Security tab, and then authenticate it with a mobile phone number or mobile app. Head over to the Dropbox blog for the full how to. [Dropbox Blog]
