On the main Pokémon website: PGL
Although hinted at as an in-game feature, it seems that you can see a timeline of what you do online on a website as well and share it with others. Looks to be one of the new features of the Pokémon Global Link.Record Your Milestones!
By using Game Sync with the Pokémon Global Link, records of your adventure so far will be displayed in a timeline. Adjust your privacy settings to decide whether to show your timeline to others, or even share your progress on social networking sites!
If other Trainers choose to make their information public, you'll be able to check out what they've done. See how far other Trainers from around the world have gotten—you may even be able to help each other out with hints and advice!
What other features is everyone hoping for in the new Pokémon Global Link? I never really used it before, but looks like it can be interesting.