[jvkersch]

I'm not the original poster, and I'm about to write something gross, but I commute for long times too and I find the sweat less of an issue than I originally expected (I do live in a climate that is not overly hot and humid, though). I avoid using a backpack (in favor using panniers) so that my back isn't all sweaty, and for the rest I find that the sweat dries up quickly and doesn't leave a trace. In the worst case I take a spare t-shirt and a deodorant stick.

[Piskvorrr]

You don't. I would be worried whether the cow-orkers share this view (simply because everybody is habituated to their own smell, not noticing it as much).

Good point with the backpack though - with it, I was sweating like a racehorse, even after coming out of the shower; without, I was only sweating.