We just bought two Droid X phone and are setup on one account. I trying to setup the contacts. I have the first one (primary) working with the backup assistant but can't access the second one through the assistant. The second phone says that it "synced" 12 contacts to the Backup assistant. But I can't find a way to access at the "My Verizon" website. I can only see the primary.
In order to access Backup Assistant for the secondary line on the account, you will have to register the secondary line on the account as logging into the primary account will only display the contacts for the primary line. You are able to access registration through the following link: