Just thought I'd start this before running off to dinner... I was in class today and the professor asked us if we were Generation Rx, a question that sparked basically the largest digression from discussion in the history of that class, and launched us into repeating every label our generation's encountered so far. These included:

Generation Rx, apparently
Generation Y, or "why?"
Generation Me
iGeneration
MTV Generation
Generation 9/11
Echo Boomers

This is interesting to me for a couple reasons. One, when do we become generationally situated? Or how much time has to pass for one of these generational namesakes to stick? We have Generation X before us, and the Baby Boomers before them-- those are pretty solidified.