Twitter's Evan Williams posted about the state of Twitter from a mobile perspective, "there was plethora of 3rd-party Twitter apps, people were having trouble finding and selecting one because none were called "Twitter." For this reason, we acquired Tweetie and turned it into Twitter for iPhone, we took similar approach with Twitter for BlackBerry and Twitter for Android," said Williams
Williams also whip out some impressive numbers: "Twitter now has over 145 million registered users and almost 300,000 number of registered OAuth apps in the Twitter ecosystem." And the performance of Promoted Products has "exceeded our expectations."
The following chart shows top ten apps people have used to access Twitter in last 30 days: "while smart phone clients are important, there're even more people who use mobile Twitter web site and/or SMS."