Same here, no resolution. Summary:
FT232R USB appears in 'USB Device Tree', no serial port ever appears in /dev/tty* or /dev/cu*, nor is there anything relevant in via 'sudo dmesg', nor does it ever show up in arduino IDE.
I have both latest drivers from http://www.ftdichip.com/Drivers/VCP.htm
and have also tried old drivers from arduino 0.2 (though they are the same).
It works fine in Linux. I worry that there is something unsupported in OS X 10.9.3 that does not allow the FTDI drivers to work.
indeed - there is a conflict with 10.9 drivers - see here: http://forum.arduino.cc/index.php?topic=198539.0
unfortunately the solution did not work for me... thus, I'm in linux & works great.