I was having some fun with PowerShell to talks against the SharePoint object model. I needed to know if a SharePoint solution was installed and if it was deployed. I got to the code below. Might be handy for someone to see how easy it is to get info out
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Read the complete post at http://weblogs.asp.net/soever/archive/2007/10/10/powershell-is-a-sharepoint-solution-installed-or-deployed.aspx