LET Motorsport's flash is ready to flash now.
Power increase is 12 hp and 6 ft/lb.
Here is a thread on the N52 flash on the 3-series, but 1-series is the same:
http://www.e90post.com/forums/showthread.php?t=250489
Here is the feeler thread for the N52 flash:
http://www.e90post.com/forums/showthread.php?t=258444
Feel free to start a feeler thread on 128i N52 flash for Socal, Norcal, and the West coast.