As already mentioned, sounds like you should join up on either Raptr or Playfire.
Yes, either is another service, but both can keep track of your gaming libraries (across multiple platforms).
Although I do not use either all that often, I am a member of both, and I think Playfire is pretty damn good, especially for what you are looking for.
What I mean is it does a pretty good job of automatically adding any games I start playing to my linked accounts (XBox Live, PSN, Steam), and I get an email when it does so.
It is pretty good with doing just that, so I recommend giving it a whirl.