Do you know why you are only allowed to have 140 characters in every tweet? When the site first began, it was geared towards people who used SMS to update their status messages. To this day, the team behind the scenes remains dedicated to mobile users. They recognize that being able to tweet while on the go is crucial. Many of us communicate with business contacts and family members by jotting off a quick tweet. We need an app that works without being complicated to figure out and maneuver around in.

After carefully analyzing the iTunes store, Twitter CEO Evan Williams and his team realized that most of us are simply not happy with the mobile apps on the market right now. Ev and the gang feel strongly that people everywhere should be able to access Twitter “without friction or confusion.”

To help cut through that confusion, Twitter just announced that they have entered into a deal to buy the Tweetie app. Tweetie is one of the more popular iPhone clients, and has been selling for about three dollars on iTunes. In coming weeks, the application will be renamed to Twitter for iPhone, and will become a FREE download.

Williams hints in the announcement that more developer opportunities will be opening up in the future: “Developers, services, and publishers will be able to leverage the Twitter iPhone and iPad applications to create additional innovative tools and integrations for users. Millions more active, engaged, mobile users means more opportunities for all of us.”

Tweetie creator Loren Brichter is going to become a member of the Twitter mobile team. Future plans include launching a Twitter iPad app with Loren’s guidance.