Twitter phenom based on simplicity

In this insighful article, Mashable! makes the argument that it's Twitter's micro-sized feature set + good API that makes it such a word of mouth phenom. I completely agree. Think about it:  If Twitter had more fixed, robust features, there would be less impetus for developers to write applications, and for these developers/users to blog about it. Ultimately, the simplicity of Twitter is the basis for all its free PR and advertising. 

Taking this thought even one step further, I love how a social platform like Twitter actually helped prove the point that conversational and SM is the "it" form of marketing right now. I mean, there are a ton of other web services and micro platforms, but the conversation about Twitter (and it's good API) is really what make it stand out from the crowd.

Oh, and in case you haven't really been engaging with Twitter much because you don't feel like dealing with what all the hash symbols are all about, check out this wiki.