360voice.com is basically a website where it 'gives your xbox a blog'. You pretty much just sign up and give it your gamertag and it does the rest for you. Here is mine for example. What I really like about it though, is that it has Challenges sponsored by Old Spice. It is sort of like the Xbox Rewards Program thing. You can join challenges on your own, or make it find ones for you automatically. The challenges are basically who can add the most gamerscore in an amount of time. Here are the rewards: The challenges I have been in have been the tier one challenges. Two of them were for $20 Best Buy gift cards, while the other two were for 'bragging rights' (you don't get anything). I actually won one of the Best Buy gift cards and it arrived today. For some reason, it hasn't put me in anymore challenges recently. Click here for the official rules. I bet there are people out there who keep making new accounts to win these. But, it is actually quite interesting, and rewarding if you win. Here is what the challenge page sort of looks like. I probably only one this one because nobody else really did anything.
I think you get the challenge code from the person who starts the challenge. I'm not sure though. I was sort of confused by the fact that people could make there own, so I just made it easier on myself and edited my profile to join them automatically.