Easy Shuffling and Repeat
If you haven't yet discovered this feature, you'll want to check it out. When a song is playing, you can tap on the iPhone's display of album art to bring up the progress bar. You can then use the progress bar to move backwards or forwards within that song. It also displays your current repeat and shuffle selections. Tapping on the repeat and shuffle icons lets you toggle through the various choices (shuffle on/off and repeat none, all, or the selected song).