Bluesmirf question

Hi, I am thinking about making my Irobot Command Module wireless with Bluesmirf. Unfortunately, there doesn’t seem to be any exposed Serial Rx and Tx pins for the Command Module, is there anyway I can still get Bluesmirf working with the Command Module?

If not, then I was also thinking of using either the Arduino Diecimila with Bluesmirf or getting the Arduino with Bluetooth built in. For this, my question is what is the advantage of the Arduino BT over the Diecimila + Bluesmirf option (since BT is more expensive)?

What other options are available? Basically I want a microcontroller on the robot that can write messages and read commands via bluetooth from my laptop.

-Thanks.