What do you wear to cycle into work?

Just curious, I've been looking at Rapha's casual range for daily commute clothing and also considering going into Lycra+Cycling jersey then change at work. Do you guys wear something specific when commuting.

rapha's casual stuff is pretty good for commuting. been using their paul smith trousers, fixed shorts and various baselayers as tshirts/shirts etc. lasts ages too so the initial price is mitigated by longevity.
depends how long your commute is though.
i have 7 pretty quick miles each way and no amount of the overpriced but nice bike-ponce kit i like is going to get me out of the need for a shower and a change of clothes. especially after you have a backpack on.