Drupal for Facebook & Ubercart "add to cart" forms

The test site I fired DFF up on today happened to have Ubercart, so my initial content on FB contained some UC forms as viewed in the ?q=node view (teaser mode).

Clicking "add to cart" didn't work. Has anyone played with Ubercart / D4FB integration? Thoughts / results?

(Not critical for me, just raising as I noticed it and thought it would be good to flag.)