Apple has introduced a new, tinier version of its iPod shuffle — the lowest-end product in its popular music player line. Previous versions have been bare bones in terms of features and capacity, but their form factors have always been unmistakable Apple designs. The latest shuffle is tricked out with a 4-gigabyte capacity that accommodates up to 1,000 songs. That’s twice as large as previous generations of the shuffle, although this model is just half its size.