Marco has made several of his Powershell user group sesssions available online for online viewing.  He’s brought together some great resources, and is a strong supporter of the Operations Manager Command Shell newsgroup.

Sessions available at:

#1: http://marcoshaw.blogspot.com/2007/10/windows-powershell-virtual-user-group.html
#2: http://marcoshaw.blogspot.com/2007/12/windows-powershell-virtual-user-group-2.html
#3: http://marcoshaw.blogspot.com/2008/02/windows-powershell-virtual-user-group-3.html
#4: http://marcoshaw.blogspot.com/2008/02/windows-powershell-virtual-user-group_21.html