Here’s some PowerShell Projects that caught my eye:

1.       PowerShell Management Library for Hyper-V ( http://www.codeplex.com/PSHyperv )
 

2.       Sharepoint PowerShell Deploy ( http://www.codeplex.com/sharepointpdeploy  )
 

3.       Windows Automation Snapin for PowerShell ( http://www.codeplex.com/WASP )
 

4.       SQL Server PowerShell Extensions ( http://www.codeplex.com/SQLPSX )
 

5.       VS Command Shell ( http://www.codeplex.com/VSCmdShell )
 

6.       PowerShell SharePoint Provider ( http://www.codeplex.com/PSSharePoint  )
 

7.       PowerSSAS – a PowerShell Provider for SQL Server Analysis Services (http://www.codeplex.com/powerSSAS )
 

8.       Windows Installer PowerShell ( http://www.codeplex.com/psmsi )
 

9.       PowerShell Cmdlets for Visual Studio Team System ( http://www.codeplex.com/pscmdlets4teamsystem )

There are about 100 PowerShell projects. 
Go ahead and get involved.