I did this redesign for Lastpass. I actually mocked it up in a few spare hours while at SXSW in Austin last March, so the design is far from perfect

Lastpass is an application I use daily, and it holds some of my most sensitive information. It also has one of the worst User Interfaces out there.

Good design can really give you a sense of security. Look at Mint.com; a site that asks for your bank account logins.