Storyboards work -- afaik -- through the use of masks. You mask each photo you add to match the photo-frame on the storyboard (or this is done automatically). All the elements -- the masked photos, the storyboard -- are layered on on top of the other.
Aperture does not support layers, and does not mask images this way. Therefore I don't think it's going to work.
Storyboards are another kind of presentation. In Aperture, they would be like Slideshows, Books, Web Galleries, etc. Why don't you click "Aperture→Feedback" and ask them to add Storyboards?