Have you ever wondered how certain Facebook pages add Like buttons to their custom tabs? Look no further.
Many have asked me how sites like Threadless are able to add multiple Like buttons and comments to their Fan page, allowing visitors to buy, Like and comment on any t-shirt on their Shop tab.
Well, it turns out it's actually quite easy, using the fb:comments FBML tag.
Using fb:comments, you can add a Like button and comment boxes in multiple places on your Facebook tabs and, optionally, each can be accompanied by a user comments