I'm really interested to hear how it goes, because I could never quite figure out how the HIDs would work in a single-bulb application like the 9007's are. I only mention it because the discussion came up in the Audi forums about flashing your brights with HIDs, and it was concluded that since the model in question ('97 A6) left the lows on when the highs were on, it wouldn't matter. But I'm curious about the warm-up time, etc.
Not to say that they won't work, but I haven't been able to rationalise it in my head yet, so I can't wait to see it in action! These cars sure could use brightening up!
-John