Just got home from a 2-hour each-way drive on the freeway... I'm stoked.
80-88 mph, AC on the whole way... and I got 30.42 mpg. The best tank yet, with the AC!
On the return trip tonight, I didn't have the AC on, and kept it at about 78-79. I'll fill it up in the AM and see what that tank did.
As far as shifting before 3000, I have been doing that too. Then it crept up to 3500... then 3750... 4000...and it seems to give better performance around town, without a significant impact on mileage. In fact, I've gotten progressively better mileage with every in-town tank so far. I'm getting just under 25 in town.