what is the exact problem?
Seeing as this is a Mac issue maybe I can help.
Can you tell me the models of your lacie drives and if you are using just the firewire cable or do you have any power adapters connected to the drives?
The reason I ask about the power cable is that daisy chaining firewire drives requires that the additional drives be powered as the Firewire is incapable of providing eneough power to spin up both drives.
Let us know
If you could power the second drive it will let us know that it is not an issue with over straining the power bus of the Firewire which is the commoncause of this issue, If you dont have a second power aapter yo ucan try powering the first drive from the firewire cable then powering the second using the external power supply,
Let me know how you get on.
If you can power the second it should then mount to the desktop.
Let me know what happens.
I had to go to my daughters graduation from Kindergarten, I thought I had marked myself away.
The simple answer to your question is that yes you can get an external powered firewire hub.
Can you tell me what type of machine you are using?