Apple just announced an updated Mac Pro with with a processor bump to 3.06GHz Intel Xeon X5675 and an ATI Radeon 5770 or 5870 graphics card. Dual solid-state drives round out the package as well as Firewire and USB 2.0 ports. No USB 3.0 ports are attendance.
The new model includes 801.11n and Bluetooth and will be Mountain Lion compatible. The machine is shipping now and will start at $2,499.
This is quite clearly a minor improvement to ensure that new Mac Pro buyers will be Mountain Lion compatible and to encourage stragglers to upgrade now rather than later.