Two weeks ago I wrote Get-LocalLastLogonTime and blogged about this. In this script I use the [adsi] type accelerator in combination with the WinNT provider to retrieve the LastLogin property of a user account. I wrote a short article on this for PowerShell Magazine : Get last login date for local account

1

([ADSI]"WinNT://computer/jaapbrasser").lastlogin

For more articles like this, have a look at the External Articles section of my blog, it contains all the articles I have posted on external sources such as PowerShell Magazine.