Raptr is pretty much like xFire except much better. You can log gametime, chat with friends, and earn reward points you can spend on neat gaming stuff like gaming peripherals or beta keys.
http://raptr.com/You can transfer ALL your xFire and Steam hours to your Raptr account so you can earn some starter points to use. Raptr's Rewards system is how I was able to get myself this sweet
Logitech headset.
In addition, if the Raptr client fails to log some of your hours, you can do manual logging to keep your gametime accurate.