The XFBML tagcan be found within the SDK but is not listed publicly. Previous iterations of 3rd party ‘want apps’ have made it possible, but this is the first time found within the actual Facebook environment.
A ‘want’ button could be a major tool for marketers as users could essentially make wish lists that show a different intent than a ‘like.” In addition to simply allowing users to want items, this data could be very beneficial for targeted ads including sales, discount or stocked items in the area.
Waddington was able to get the Facebook Want button to show on his site, but it would error out when clicked:
InsideFacebook did contact Facebook on the issue and was given this response:
“We’re always testing new Platform features, however we have nothing new to announce.”
For more information see InsideFacebook.