I have a bit of a dilemma.  I work out just about every day, and I sweat a LOT.  I definitely want to wait as long as possible b/w washes but I'm scared that my hair will stink like sweat if I don't.  Plus, my scalp has a tendency to get flat and oily if I don't wash it often, while my length and ends are generally dry.  Right now, I wash with shampoo every other day (on my roots only) and the days I don't wash I rinse w/warm water and massage my scalp.  Is wetting the hair every day bad?  Does anyone else have this problem?  I don't want to give up my daily workouts OR the health of my hair.  Please help!!

Rinsing your hair with water is not a bad thing.  During the summer when I bike every day, I rinse my hair with water to keep it fresh.  Angel Spun's suggestion of using conditioner is also a good one.  When using a conditioner to cleanse - a "thin" conditioner works best.  You might even try watering out your favorite conditioner to use this way.