As you may or may not know, Microsoft discontinued Xbox LIVE service for original Xbox games today. This includes Halo 2. I played my last games yesterday, and so many people were online, I got matches faster than in Halo 3. It was a blast. Now I'm really sad to see a whole era of my life (even though for most of that era, I couldn't play Halo 2; I just marveled at the idea of playing it).
Good thing there's still Xbox Connect.