People who don't cycle much often think showers are necessary.
In reality once you get fit you don't sweat much (I get far sweatier on the tube than cycling), and if you're overheating you can always slow down slightly.
* Shower before leaving then you get rid of the dirt + bacteria that makes the sweat smell.
* Wear clean lycra - this wicks sweat away before it has a chance to start smelling.
In London my cycling commute of 1hr would take over 2hrs by car, and 1hr15min by train. Cycling is often the quickest way. You also combine exercise and commuting time which leads to a significant overall time saving. I don't feel the need to do a lot of other exercise after cycling 200 miles a week.