With PS3Heroes.com you can easily update your Twitter status with newly earned Trophies. These are the easy 3 steps.
If you not already did it, register your PSN-ID and login.
Visit the settings and add your Twitter username. The settings look like this afterwards:
Click on the link under your Twitter username to go to Twitter.com. If you aren't logged in to Twitter, you will need to do so. Afterwards, you will see the following dialog on Twitter.com:
Once you clicked Allow, Twitter.com will redirect you back to PS3Heroes and the settings will look like this, indicating that PS3Heroes.com now is allowed to update your Twitter status:
When you now earn new trophies while playing your Playstation your PS3, it will shop up on Twitter like this: