At the moment it is possible to add text to an album, but not to an individual picture (at least I could not figure out how). I think it is crucial for any kind of "album" that one can add text (comment) to individual pictures. If you think the same, I would suggest that you add a title, which is not only displayes with the picture, but also also on the album level together with the thumbnails (trying to use the picture name as a title is not a good idea.), and a text, which ist displayed only with the picture.