NWA's Computer Likes Me
At 
sethb's urging, I logged in to look at my flight reservation to see if maybe seats freed up on the aisle. Turns out I didn't have to do anything -- Northwest's reservation system had, without any prompting from me, moved our seats from the previous window-center to a center-aisle pair, which is a great relief to me, for it means I won't have to climb over someone multiple times. (On a typical three-hour flight, I will have to get up at least twice -- diuretics may keep my blood pressure under control, but they're not good for situations where you're supposed to sit in one place for hours on end.)
sethb's urging, I logged in to look at my flight reservation to see if maybe seats freed up on the aisle. Turns out I didn't have to do anything -- Northwest's reservation system had, without any prompting from me, moved our seats from the previous window-center to a center-aisle pair, which is a great relief to me, for it means I won't have to climb over someone multiple times. (On a typical three-hour flight, I will have to get up at least twice -- diuretics may keep my blood pressure under control, but they're not good for situations where you're supposed to sit in one place for hours on end.)