To link your account, first enter your profile page (click your username), then scroll down to the just added "Sync with IMDb account" section. Now just follow these instructions:
1. Press the 'Get Key' button to receive a key. 2. Copy and paste the key into the first line of 'Your Description' on your IMDb profile page. 3. Enter the address of your IMDb profile (Ex. http://www.imdb.com/user/ur12345678/) into the second input box and press the 'Sync Profile' button to sync your profiles. 4. After you have synced your accounts you can delete the key from your IMDb bio. 5. Reload this page to see if your IMDb posts show up.