Itchy fingers and sweaty palms are all tell-tale signs of Twitter withdrawal. There's no need to go without your 140 characters or less with these official Twitter apps for a range of mobile platforms.
Having Twitter on your mobile is almost as essential as Facebook for keeping up with what's going on. The apps listed below are all available from the relevant app marketplace for each platform, and are free. There are a number of other third-party Twitter and social media apps available for mobiles too, including versions for Android, iPhone and BlackBerry. There are also third-party clients for Windows Mobile and Symbian users, or you can visit Twitter's mobile interface at mobile.twitter.com.
Just last month, Twitter acquired one of the most popular iPhone Twitter apps called Tweetie and re-released it for free on the iTunes store. The official app shares many things in common with Tweetie, but has numerous tweaks including a rework of the search function.
Even if you don't have a Twitter account you can still use the app and search for terms or view trends. Grab the official Twitter app from the iTunes store.
The official BlackBerry Twitter app has recently been updated and now supports keyboard shortcuts, allows you to edit retweets and shows geotagged tweets in BlackBerry Maps. Grab it from the BlackBerry App World.
The official Twitter Android app closely mimics the web interface and allows you to tweet straight from applications. The catch? You'll need to be running Android 2.1 to use it. To grab the app, head to the Android Market. Even better news is that for developers, the app is open source.