sending serial commands wirelessly

is it possible to send serial signals wirelessly (via cheap RF link modules like - http://www.sparkfun.com/commerce/product_info.php?products_id=8946), directly from the computer (using FTDI only, without an arduino) ?

What kind of board do you have with an FTDI chip on it? That will determine whether you can connect the transmitter to the board.

What are you attaching the receiver to?

the FTDI is this: http://www.sparkfun.com/commerce/product_info.php?products_id=9115

and on the receiver end - i have an arduino that needs to interpret the data and control a servo..

An alternative on the PC end: http://www.sparkfun.com/commerce/product_info.php?products_id=8687 But, you should be able to make the FTDI breakout board work with the XBee.