It's amazing how many excuses people manage to come up with for how it's impossible for them to follow this kind of advice. Turns out, it's impossible up until the point that you just shut up and start doing it.
Sweating is only a problem for most of you because you're unhealthy and overweight. You're overweight because you get no exercise. It's okay: I was too. Then I started cycling to work and lost 50lb. Now sweating's not a problem, and I can go significantly faster without showing up to work drenched.
On my old commute (7.5mi), I ended up getting it down to 20 minutes once I got in shape. Time to drive? 20 minutes. Except instead of arriving to work tired and pissed off, I would show up alert, awake, and having enjoyed some time out in the sun doing something fun. It completely changed my mindset at work, and got me off to a much better foot every morning.
Showering isn't a problem. Again, go slower until sweating is no longer an issue, then increase your speed to a point that you can still get to work without being drenched. If you still show up wet, or if you're wet from rain, bring a change of clothes. I infrequently had to, but it's not that hard to ride in wearing cycling clothing (which will, incidentally, keep you much drier) and bring a change of clothes with you. Go into the bathroom, change, and be on with your day. It takes less time than it would to find a parking spot for your SUV anyway.
Weather is, again, not a big deal. We as humans have invented clothing for all sorts of weather conditions, intersected with the requirements of all sorts of physical activities. Cycling is no exception. There's cycling clothing for rain, for cold, and for rain _and_ cold. It costs equivalent to about a week's worth of driving for you 30-minute commuters. Less if your commute is longer.
I mean, come on. Hacker News is a site supposedly full of entrepreneurial go-getters. And yet this guy gives you a way to save hundreds of thousands of dollars, your time, and your sanity, and all I hear is griping about how minor inconveniences make it completely impossible. Yeah, some of you are trapped between a rock and a hard place. Some of you are already owning impossible-to-sell property forty miles out in the 'burbs. But for the rest of you, quit making excuses and just give it a try — it's seriously not as hard or inconvenient as you're making it out to be.
Who knows? Maybe the next time your apartment is up for renewal you'll find yourself moving closer to the city rather than farther away for once. And you won't ever look back.