If you don't have a shower available to you, how do you handle that?
In winter I know, we don't get as sweaty... if I'm only doing 9-10 miles to the park and ride. But there's changing to consider, and the time it takes (which obviously isn't on the clock...), and changing back, and whether or not to sit in a chamois on the 45 minute bus / train commute... ack! Should I even WEAR special padded shorts/pants or should I just have a bike with a gel seat or something?

These are the logistics making me sit here with my hand in my mouth, thinking, eek!

the traffic I can deal with...

Oh yeah, and what about locking your bike at the park and ride? Do you just leave it out? what if it rains? what if someone steals the saddle? Do you take your saddle to work with you? Maybe I should just get a cheapo saddle. But then, if someone steals THAT, and then how do I get home?

Also, what about emergencies? You know, like, of the world disaster ilk? Like, if they have to evacuate a town or city? And your bike is all the way back at the park and ride? Ack!!!

I want to do this.
I know I can do this.
I am working myself up to it.
I just need someone to tell me it's all going to be okay.