Make the listing of talks on the dashboard prettier

# Before

![before](https://f.cloud.github.com/assets/88061/758150/fb3f7b76-e716-11e2-998f-f37e9f135077.png)

# After

![after](https://f.cloud.github.com/assets/88061/758147/c94696c2-e716-11e2-8b5e-9f0018b8c563.png)