Apple today announced new PowerMacs. The architecture new features two Gigabit Ethernet ports on the motherboard, a 100% increase, which is great for Xsan. The PCI slots are now PCI Express, which is not backwards compatible with PCI or PCI-X. So you'll need new Fibre Channel HBAs for these new Macs. Apple says they are shipping their PCI Express HBA in 3-4 weeks.