ps3trophies.com, playfire.com and yourgamercards.net are the only gamer sites i've seen that can successfully capture the information. Ps3trophies have some sort of downloadable gadget which is the only basis i have for that they somehow implemented that gadget into their site heres the main trophy page. That gadget may be a good source of where the trophy data is coming from.
http://www.ps3trophies.com/trophycards/ on top of that they seem to generate a leaderboard from the information received by these cards and they seem to auto update as opposed to the cards that you can generate off us.playstation.com and eu.playstation.com
As i run a ps3 community this would be of great benifit as a modification as i see the xbox community already have one.