I believe this will help you with your request though I cannot take credit for the script.
http://communities.vmware.com/thread/389982
One way that you should be able to get HostSystems' HBA WWN info is like:
## get all HostSystems' .NET View object
Get-View -ViewType HostSystem -Property name, Config.StorageDevice.HostBusAdapter | %{
$viewHost = $_
## for each HBA that is a HostFibreChannelHba, get some info
$viewHost.Config.StorageDevice.HostBusAdapter | ?{$_ -is [VMware.Vim.HostFibreChannelHba]} | %{
New-Object -TypeName PSObject -Property @{
VMHostName = $viewHost.Name
## the HBA Port WWN in hexadecimal, with each octet split by ":"
HBAPortWWN = (("{0:x}" -f $_.PortWorldWideName) -split "(\w{2})" | ?{$_ -ne ""}) -join ":"
## the HBA Node WWN in hexadecimal, with each octet split by ":"
HBANodeWWN = (("{0:x}" -f $_.NodeWorldWideName) -split "(\w{2})" | ?{$_ -ne ""}) -join ":"
## the HBA status ("online", for example)
HBAStatus = $_.Status
} ## end new-object
} ## end foreach-object
} | Select VMHostName, HBAPortWWN, HBANodeWWN, HBAStatus | Sort VMHostName
This gets each host, and for each fiber channel HBA in the host, lists the Node- and Port- WWN in hex. The output would be something like:
VMHostName HBAPortWWN HBANodeWWN HBAStatus
---------- ---------- ---------- ---------
myhost0.domain.com 10:00:00:00:00:00:00:e0 20:00:00:00:00:00:00:e0 online
myhost0.domain.com 10:00:00:00:00:00:00:5b 20:00:00:00:00:00:00:5b online
myhost1.domain.com 10:00:00:00:00:00:00:77 20:00:00:00:00:00:00:77 online
myhost1.domain.com 10:00:00:00:00:00:00:58 20:00:00:00:00:00:00:58 online
...
