For a while, Sony opened up part of their PlayStation Network so sites like Raptr and GamerDNA could track trophies, as these sites have been doing for some time with the 360 network. Somewhat surprisingly, Sony have pulled the pin on this and closed the network again (Raptr post on the subject).

This seems to be a hell of a dumb manoeuvre on Sony's part, and it's hard to fathom how this helps them compete against the 360's equivalent.