Here's a video I took of BlackBerry Curve 3G during its launch in Makati the other day.
The most noticeable design improvements (vs. BlackBerry Curve 8520) are the following:
1. The trackpad is now more protruding and feels more sturdy.
2. The back case now has a textured rubber finish, which attracts less fingerprints and scratches.
3. Front rim now flaunts metallic accents