I've just released an iOS app for https://www.gamerankr.com, and late last year ported it over to source data from giantbomb (my old data provider was crap, and the giantbomb data is great!). GameRankr is simular to goodreads, but for video games instead of books.
-see updates from friends
-track games you want to play, have played, and are currently playing
-ratings and reviews
If you have any feedback please let me know!