Twitter is a feed, not a blog

On a blog, you can take several paragraphs per post to describe things in detail, attach images or video clips, and receive equally detailed replies through comments.

In an RSS or Atom feed that's going to be useful to a typical reader program (especially one on a mobile phone), you only get one URL per entry, one line to describe that URL in, and no multimedia or rich formatting (such as colours, bold, italics and alternate fonts). But feeds are easier to read on mobile phones, both with and without browsers; Yahoo! offers RSS alerts via SMS, while Google offers a version of its Reader application for mobile browsers.

With its smaller post size limits (and the terser description that results), as well as a lack of multimedia or rich formatting, Twitter is really more like an RSS feed than a blog. Just as a blog can't be replaced with an RSS feed or vice-versa, neither is it interchangeable or comparable to Twitter. The apple doesn't make a very good orange.

Twitter is a feed, not a blog