Ya I did I hike in the middle of June in Arizona and I tried the rubbing alcohol thing. It worked somewhat well. My feet weren't too hot, but I was wearing Chacos, so the breeze got to my feet which was really really nice.
But I found that it dried the skin between my toes too much, and caused cracking, if I used the technique too often.
I didn't find this to be the case, but I'm sure it is different with different people and skin types. Personally i'd reccomend it to others, and I'll keep doing it while desert hiking or just in really hot weather.