My guess is most of the people who are receiving the first few batches of M5s are likely to be the kind of folks who'll get atrocious fuel economy, thanks to their spirited driving styles...
Don't know about the EPA, but I believe the EU stats are done on a rolling road, using a standard cycle for all cars.
Given my high-speed cruising habits, I'm actually hoping that the B5 isn't TOO much worse than the current 26mpg average I'm getting in my 530i. Low 20s is my bet...
Anyway, this thread wasn't meant to be about gas mileage, even though I guess everyone's now worried about gas prices/availability in the US!
My main wish is the factory availability of a rear seat DVD solution for the E61 - the planned Individual option was cancelled and if you have the sunroof (standard on the UK-spec B5) you can't fit the roof mounted unit.
Next on the wish-list for the B5 would be an M-differential or something similar.
If I had an M5, I'd be wanting more torque, a bigger fuel tank and better fuel economy. iPod link too, of course - if they can manage it on a 1-series, why not on the M5? User-defineable HUD setup would be very cool, and could include optional display of some of the non-standard gauges, too. And of course, last but by no means least, some decent brakes - that goes for the Alpina, too.