This is far and away the best "remote" iTunes controller and lyric/cover fetcher I've found. I've stopped looking at others. I don't see the point. GimmeSomeTune does everything I want and is easily customizable. I modified my hotkeys so they're all intuitive to me, and I pretty much keep iTunes hidden and just use Gimme.

My only (very minor) complaint is that saving edits you make to fetched lyrics could be little easier.

/yes, I donated