Some highlights of LastPass version 1.51.2:

-A new product called Sesame for our Premium members that allows for multifactor authentication with your existing portable USB device
-Windows Mobile application now generally available as a trial for non-Premium users
-Many general improvements to our core engine: improved autologin support, non-compact search shows drop down menu of sites, reduced the frequency the notification bar is shown for sites that have login forms on every page, more translations, etc.
-Support an optional way to store a disabled one-time-password on your PC in case your forget your password: this allows password recovery for those who want it without revealing your password to LastPass.

As always, a more complete list of the changes can be found here.