That's possible, I think there is some unique number in the FTDI?
Anyway, being able to select a ICSP programmer from the IDE is missing for me.
This is in the preferences.txt file, so it would be easy to integrate...
I have 2 Diecimila, a Sanguino, a Rainbowduino and a few other standalone circuits. It's often useful being able to quickly switch from one to the other, for example if you're programing a Diecimila that needs to talk to a Rainbowduino?