31Jan/100
Link: Parse NMAP XML Output
I came across this while browsing around today. The post was released in June 2009, but still a cool way to use PowerShell.
http://blogs.sans.org/windows-security/2009/06/11/powershell-script-to-parse-nmap-xml-output/
I am a frequent user of NMAP and of course PowerShell and this seems like it will be really useful.