I just finished my Boarduino DC today. If I used a DC Adapter the green LED lights up and if I press the reset button the red LED lights up a few times. But if I use the "FTDI Friend" and press the reset button nothing happens.
I cant upload sketches. I followed the Tutourial and choose "Arduino Duemelianove or Nano w/ ATmtega 328".
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
Sorry for my bad English. Thanks.

So, powered by the FTDI cable, the red light flashes when you press reset now?
Hold the shift key down when you press the upload button and post the results.
Also, if you post photos of the front & back of the board we can check for any assembly problems.

Ok. I didn´t know that feature. The red LED on the ftdi Friend only flashes a few times and not very fast.
avrdude: Version 5.4-arduino, compiled on Oct 11 2007 at 19:12:32
System wide configuration file is "C:\Users\Christoph\Documents\arduino-0018\arduino-0018\hardware/tools/avr/etc/avrdude.conf"
Using Port : \\.\COM4
Using Programmer : stk500v1
Overriding Baud Rate : 57600
avrdude: ser_open(): setting dtr
avrdude: Send: 0 [30] [20]
avrdude: Send: 0 [30] [20]
avrdude: Send: 0 [30] [20]
avrdude: Recv:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: Send: Q [51] [20]
avrdude: Recv:
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
avrdude done. Thank you.

It should flash about 3 times. That indicates that the processor has reset and the bootloader is ready.
The diagnostic output you posted shows that no data is coming back at all.
Are you sure you have the right COM port selected?

Are you sure you have the right COM port?
Unplug the FTDI cable from the computer and check the Tools->Serial Port menu. Write down the ports that you see.
Plug it back in and open the menu again. The new COM port is the one you want to use.