Adbusters has a scathing and humourless (as is their style) criticism of the hipster trend.  Much of it i agree with, some of it i resemble, but its totally worth a read.

My favourtite quote:

Less a subculture, the hipster is a consumer group – using their capital to purchase empty authenticity and rebellion.

Check it out here: http://www.adbusters.org/magazine/79/hipster.html

p.s. my bike is single speed, not fixed, so there.