Perhaps many of you here can petition the wordpress staff to make changes to the slideshow feature and add options, as there are currently no options available.
-Size of the slideshow cannot be increased, which should be essential. The default is way too small.
-Navigation buttons (back, play/stop, forward) appear ON the pictures rather than below them or to the side of them, and it makes no sense, it's distracting, invasive, and ugly.
-Speed of slideshow cannot be adjusted.
Maybe if enough people write to WP they will make these basic changes that would drastically improve the slideshow feature, because as is, it's pretty useless, though it could be a great feature.