Rest, ice, elevation, anti-inflammatories...repeat. My knees are feeling SO much better! The iliotibial band is almost pain-free! Yeah! To strengthen my knees I have started some light knee lifts. It seems as if "racewalking" causes more swelling than regular walking, so I've been doing light easy walking. I've tried to get in some miles every day, which helps. Also, high heels seem to be aggravating, so I've been wearing lower heels.
I'm sure I'll be ready by the time the half marathon rolls around.