Dropbox Introduces 2-Factor Authentication 
Two-Factor authentication sucks. It's too hard for users. Most people will never us it. Dropbox should consider using Rublon (yes, that's my startup): <a href="https://rublon.com" rel="nofollow">https://rublon.com</a><p>7 reasons why you should add Rublon to your website:
<a href="http://blog.rublon.com/2012/why-add-rublon/" rel="nofollow">http://blog.rublon.com/2012/why-add-rublon/</a>