Fine, curly, chin-length hair here. BUFF! I cut mine into two--then fold over. I wear low on my forehead so it catches "most" of the sweat (sunblock not required on forehead--YOUCH). It leaves me a little more presentable when I take off my helmet--but nowadays we go in for our "coffee to go" with helmets on. People don't even look twice--at the helmet anyway--the tight shorts, crazy jersey and clicky shoes get all the attention.
Allergic to your own sweat--that STINKS!
"Well-behaved women seldom make history." --Laurel Thatcher Ulrich
'09 Trek WSD 2.1 with a Brooks B-68 saddle
'11 Trek WSD Madone 5.2 with Brooks B-17