I published the source code for the Cmdlet Help Editor on CodePlex here: http://cmdlethelpeditor.codeplex.com/ . Please feel free to contribute. for more information on the Cmdlet Help Editor, please check out the following post: http://blogs.msdn.com/b/powershell/archive/2007/09/01/new-and-improved...
The best way to get updated help for Windows PowerShell core commands is to type "Get-Help –Online <cmdletname>," but that works only when you're online and your firewall permits Internet access. For all of those other times, there's the new Windows PowerShell 2.0 Core Help...