Twitter v1.1 will be available in the BlackBerry App Store sometime within the next 24 hours. Here's what you can expect, according to BlackBerry:
Geotagged Tweets: Twitter started giving users the option to add their locations to tweets in March. Now they can also do so from their BlackBerrys. After a user enables the setting, it's easy to switch location sharing on and off, with an icon in the top menu bar. Followers viewing geotagged tweets on BlackBerry can see a tweet's location on a map by clicking an icon that appears in the bottom right corner.
Push Notifications: Twitter for iPhone got push notifications for @mentions in November. Now BlackBerry users can have them, too. Users can choose to receive notifications when they're mentioned or only when their followers mention them.
#Topic Autocomplete: When users start to type a hashtag term, BlackBerry for Twitter will now help finish it previously used hashtags.
Chat-Style Messages: Direct Messages have been renamed "Messages" to match Twitter's new desktop app. They're displayed in a chat-style format, which means users will be able to see an entire conversation under the message tab. The previous version only showed messages received.
New Language Support: Users who tweet in Simplified Chinese, Traditional Chinese, Polish, Czech, or Thai, can now do so on their BlackBerry.