Here's a little application I wrote, when I was bored. Basically it scans for PS3 game trophy related files like icons and the description files containing the missions to unlock a trophy and it's status (bronze, silver, gold, platinum).
The difference between the application and all the public websites which have trophy lists is, that it also will find trophies which are not released to the press people, yet. So you can be sure this will find trophies directly when they are online, even before the journalists get the info :)
You have to have curl installed by the way. It's in every Linux repositories so you simply can install it via the terminal. For example in debian distros you only need to open the terminal and enter sudo apt-get install curl to install it.
I made a PHP script to do this months ago, but since Sony stopped updating the lists on their old server, they moved them to a new server, all the new lists are encrypted and obfuscated. I just noted his program finds the unencrypted lists on the new server, which aren't updated anymore. Only the encrypted ones are updated.