Hi everyone! I'm new to arduino and I was planning on designing an LED lightscape (sort of an art project) so I decided to go with the sanguino so I could get lots of outputs. I soldered it all together and installed the drivers... (I'm running mac osX leopard with Arduino - 0016) and plugged it into my USB BUB (FTDI USB to TTL serial cable) and the green light on the sanguino went on as well as the red light but the red light blinks.. not sure if thats relevant. The problem is this, when I connect the USB BUB to my computer the serial port option " /dev/tty.usbserial-A6007nwm" becomes available but as soon as I plug the USB BUB into the sanguino that serial port vanishes! The only options left to connect are bluetooth or motorola ports which I cannot use! Also, the BUB programmer gets very hot as soon as I plug it into the sanguino. I overlooked the soldering to see if I could find any shorts but I didn't see any. Any help would really be appreciated, thanks! 
What pins on the BUB do you have hooked up? If it's not the right most two you will be pulling 3.3v to ground.
The USB BUB came with my sanguino kit with the pins pre soldered into the 2nd row from the left. I also have the jumper installed that specifies 5 volts.
Well, if the BUB gets very hot as soon as you plug it into the sanguino but works before, there's got to be a big bug on the sanguino board.
To check if you haven't already fried the BUB, you could do a loopback test with it.
Does the sanguino still work if powered by its usual power source ?
Well I planned on having its usual power source be the usb, I dont have an external power adapter. Could you please elaborate on the loopback test, I just tried looking up how to do it for this particular device and I can't really find any documentation.
There's no bug. As I said, if you look at the BUB schematic you will see that you are pulling the 3.3v line directly to ground. If you don't have another header that you can solder in one of the right 2 sets of pins, you'll have to cut the 3.3v trace. The right 2 sets of pins do not have the 3.3v line connected. Also, the jumper has no effect on that particular pin. If you haven't left it connected that way for too long, it will most likely still work.
Now the big question is who the heck assembled the BUB like that, or is there a piece of information (manual) whe haven't heard about yet ?
I mean, if it's supposed to work and came fully assembled.
The BUB I got from moderndevice came with all the headers unsoldered.
I cut the line and it works great. Strange that they would send it to me soldered that way...anyway thanks!