Even though Diapers.com's customers "cycle-out" after their kids grow up, I think the potential lies in the advisory aspect in their word of mouth (i.e. brother

Even though Diapers.com's customers "cycle-out" after their kids grow up, I think the potential lies in the advisory aspect in their word of mouth (i.e. brothers and sisters, friends, co-workers who are expecting kids/have them). People are always having kids or know someone who is. In regards to purchasing clothing online, there are some startups making inroads in that category--Fits.me, the one that won the European startup competition, Plugg, comes to mind.