I only have 800 miles on my new 09, but so far the mileage has been around 41-42. Thats mostly highway around 65-70 mph. I haven't used the cruse yet, so I don't know if that will change the numbers. So far I'm pleased with the mileage and performance.
Depends on how I ride. If I get into some nice tight curves I can see the mileage drop into the upper 30's but out on the highway with the cruise on I have seen 45 - 46 regularly. I got 55 one time but I was coming down from higher elevation so it was not a hard ride. I will go 220 - 240 before I look for a station when touring. That leaves a gallon to spare.