It's my last project. Reproduction of Windows 8 Customer Preview logon screen. With password to type.
You can slide (see screenshoot) to unlock second textfield for password change - for change you must type your password to top and new to bottom. Default is 0000. I can give you code to reset password. It's easy, but I think you won't like to search it...
I know that buttons are ugly, but I haven't graphic editing skill :/ In 1.1 maybe will be better.
Image from second screenshoot (you must drag it up before type password) is from /lockscreen/drag.jpg. You can use your own user icon - lockscreen/avatar.jpg.