Lego has released an updated firmware. Here is what the web site says:

“Updating to LEGO MINDSTORMS NXT Firmware V1.05 will improve the following:

- Multiple datafile control within user programs
- Communication with 3rd party external devices
- Bluetooth communication within user programs

NOTE: Only update your firmware if you have experienced issues related to the above”

Does anybody know more details about these improvements?

Via thenextstep.