It's hard to believe this feature isn't included on the phone. Every mp3 player/phone I've had in the past 10 years has had this ability. Seems like a big miss. I should be able to tap on the position of the track's progress to instantly skip ahead.
That said, has anyone come across any good Music Player apps in the store? I'd really like to have something with gapless playback and other general enhancements. On Android (where I just came from), I was using PowerAmp, but they don't develop it for Windows Phone. The Music apps I've seen in the store have mediocre to bad reviews, or are just geared to playing online music.