With a couple of screwdrivers, but I wouldn't. If software options are exhausted, use the warranty, take it back to wherever you got it, and tell them you want the same thing with a working ethernet port.
The touchsmarts are too new and too expensive to suggest rooting around in them without a clear idea of what you're trying to fix. Let HP pay for their mistake, they have enough money.
And it never hurts to try a Linux live cd, just to rule out hardware over software issues. If the port works in ubuntu, it's software, if it continues to fail, HP owes you a decently built machine.