My gf's '06 BRM is tuned by Kerma via their Q loader, basically an efilive autocal. Pretty nice tune, but it was like $600 for the tune+Q loader...but you have the option to flash to stock at any time.
There are not very many what we call "chips" out there for these. TDI people actually call an ECM tune a "chip" for whatever reason...never made sense to me. We like her Kerma tune, and they are nice people to deal with, just a phone call away about anytime of the day or night it seems.