ITQ VLan and Portgroup Manager
Flores Eken from ITQ Consultancy in the Netherlands is also an enthausiast VMware SDK programmer. He wrote this application in C# based on the new ESX3.x /VC2.x SDK. It allows you to easily setup all portgroups and VLan IDs on all your ESX Servers. You can first read out (use the export feature) the network settings of a single ESX Host. With that information you can then setup all your other servers.
The program also allows you to add or delete specific portgroups with the right VLan IDs and it had the option to execute a shell command thru an SSH connection to multiple servers at the same time.
Download ITQ VLan and Portgroup Manager
For more info about the program or about ITQ, contact Paul Geerlings (pgeerlings@itq.nl)