I just fried my Duemillanove today. I connected the ground to an oscilloscope that had the case ground shorted to the AC line.
*FLASH* *POP* followed by half the room losing power
After disconnecting everything and resetting the breaker, everything was ok except the Arduino.
The FTDI is fried...
I have actually had success using drag soldering to replace the FTDI chip but it did significantly damage the board so I cannot fix it at this point.
As far as the OP's problem, if they have a small soldering iron, small solder and a flux pen, they might be able to fix it although the 8U2 has an even finer pitch than the FTDI chip. Overall, I think they will need to purchase a Arduino like I will need to.
Bad day for Arduinos I guess