The initial target market of almost every consumer internet startup these days is blogspace. Smart companies were doing this a couple of years ago. The cost is nominal, reach expansive and early adopters are exposing their preferences post by post. Most any company that can carry a conversation can get the blog bump and gain overnight growth of up to 1 million users. However, bloggers abandon tools as quick as they adopt. Making it over the hump after the blog bump into the mainstream is a real challenge. But heck, at least it can get you a first venture round.