Couple of little additions that you might like.

You can expand properties using foreach-object as well. Eg

Get-childitem | foreach-object name

If you specify a method name instead of a property, it will call the method on the input object.

You can also inspect types using [typename].getmembers() to list properties and methods without having to create an instance for get-member.

Nice resource! I really like that layout. What did you use to generate the HTML?