No specific info about version 3.0. Please visit the main page of Tweetings for Twitter on Mac Informer.
Echofon is an easy to use, super-fast Twitter app for the iPhone and iPod Touch.
This program helps you keep track of the latest tweets.
twhirl is a compact Twitter client based on Adobe AIR.
Free, customizable Twitter client with a strong, efficient workflow.
Twitter DJ is the latest brainwave from Richie Hawtin.