Anyone who is using Twitter in any sort of promotional or professional capacity is probably already using Vancouver's own HootSuite. Both the web version and the iPhone application are the best options for managing Twitter feeds, timing the release of tweets and tracking the reach of your Twitter message. Now the application has added new features, making the service even more useful.
The new features were announced in a blog post on May the 19th, and include the addition of support for saving items to Instapaper for later reading, translation to Japanese, German, Spanish, and Portuguese as well as "Tweet to Email" allowing Twitter posts to be sent to those few people who don't have Twitter accounts.
The update includes both the Full and Lite version of the HootSuite iPhone applications.