I just typed the follow to try and get my SharePoint site:
$spWeb = Get-SPWeb -Identity \"http://nycs00058260/sites/usitp\"
It gave me the
I think this need to be run from the Management Shell rather than the console, it sounds like the module isn't being imported into the Powershell console. You can add the module by running:
Add-PSSnapin Microsoft.Sharepoint.Powershell
in the Powershell console.