I realize this forum isn't very active, and that most people who care probably already know about HaloCharts, but a little more awareness couldn't hurt. 
 
Anyway, there's not much to explain beyond giving you a link: http://halocharts.com/reach.php?player=MideonNViscera 
 
That's me, but you can search for anyone, even if they don't have a HaloCharts account. It's basically just cool if you're ever wondering something like "Gee, I wonder where I rank worldwide/countrywide/whatever in total k/d?" and things like that.  
 
It's free, so if ya like Halo, go check yourself out.

Halo Charts is cool, it compiles a lot of information, but I've always found it slow and clunky, so I just use B.net instead.

I use it. I also use Halo Tracker. Thing I tend to go to Halo Charts for lately is for Halosphere 2.

I use Halo tracker from time to time.