HOME AGAIN, HOME AGAIN, JIGGITY-JIG: So I drove home from Bentonville, Arkansas in 11 hours, 15 minutes today, courtesy of Hertz and not courtesy of US Air, who not only couldn’t honor my ticket today, but who couldn’t even promise to get me home by Tuesday. I rented a Mazda 6 — nice car, surefooted and easy to drive — and it wasn’t bad. But jeez, airlines really suck today. Perks and first-class upgrades are okay, but the bottom line is, can you rely on them to get you where you’re going? Not so much. . . .