Get-Service will lock your service database till you close the session. If you just need the services information it is better to select the particular properties to prevent the service database from being locked. The right way to get the services information is Get-Service | select Name, Status, DisplayName
PowerSlim enables FitNesse tests to be executed directly against a database. All you need is to install the PowerShell SQL Snapin from the SQL 2008 client tools (compatible with SQL 2000, 2005, 2008). Then you can use the Invoke-Sqlcmd cmdlet.