Twitter is the fastest growing social network, positioning itself to quickly be the largest social network – far larger than Facebook, Myspace, Orkut, etc.

Twitter can attribute part of this massive growth to their open API, which allows developers to integrate Twitter functionality into their web services.

But who exactly is “tweeting” ?  It turns out that 75% of all tweets come from 5% of twitter users.  And 32% of these users are bots – systems which use Twitter’s API to send automated tweets based upon certain activities.

Sysomos has conducted an interesting study on Twitter usage:

http://sysomos.com/insidetwitter/mostactiveusers

On a side note, we’ve successfully integrated Twitter into several web services, delivering pre-configured updates based upon activities such as adding events to a website, or approving the release of new content.   We’re quickly finding Twitter to be a powerful tool for local search engine optimization.