The Blackberry 9000 is the latest 3G HSDPA Blackberry device that is expected to be launched by RIM in June this year to compete with the iPhone. Here are the major improvement that we might see in this new device:

Curvy and Sleek Design
New User Interface
3G HSDPA data connection
WiFi, GPS
PC like Full HTML, Javascript and CSS 2.1 Browser
Direct File Downloading to device
User friendly Picture Library
User friendly Media Player with automatic playlists
Faster Audio and Video Streaming
Security Enhancement
New Themes

Read more here and here

Via: Into Mobile

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