Is it possible to move OracleVM (v2) machines to an ESXi 4.1U1 machine? We have recieved these Oracle VM Machines, but we're only running on VMWare ESX machines.
Try the VMware Standalone Converter. That may convert the raw VM files to work on VMware. Alternatively, if the VMs you've received are running Windows, you can run the converter in the OS to convert the VMs to virtual ones.