Carter Shanklin over at the VI PowerShell Blog created another great Excel sheet with an integrated PowerShell script. If an ESX host you want to manage doesn't appear in VirtualCenter, you need to add it. This is a bit tricker than reconnecting since there's no inventory in VirtualCenter to tell you the IP addresses of all the hosts you use, and you also need to know a host's password in order to add it. This is another case where entering things in a spreadsheet can really speed things up. He made just such a spreadsheet, and here's a video of him using it.
Attaching lots of VMware ESX hosts to VMware VirtualCenter. from Carter Shanklin on Vimeo.
