If by "hard" you mean "impossible," I wholeheartedly agree. To make matters worse, the iPod app in iPods and iPhones doesn't have any concept of a currently playing playlist. If there's a way to manage the "now playing" list, I've never heard about it. There was an "on the go" playlist, but IMO, that's just complete BS.

IMO, while an iPod has really great hardware, all of Apple's built-in software sucks, especially the iPod app. It's only really suited for shuffle play of the entire music collection. Anything else, including picking individual tracks, albums or artists, is as painful as pulling teeth. Unfortunately, no one has come out with a good third-party music player that does not require a server holding the music (iPeng for Squeezebox Server).

I can't imagine how the music app for Android could be any worse.