Do you use your IPOD or MP3 in your main audio video system?
No, just the car and at work (cheap computer speakers)
Do you have a music server (home component) that digitally stores music and if not, is that a component you'll be purchasing in the future?
I currently use home PCs. I may explore the possibility of a server later. I have concerns about where rights management is going, but the idea of instantly-accessible high-quality music storage is certainly attractive.
What are your thoughts about hard drive based music storage systems such as portable MP3 players, IPODs and music servers/ home theater PC's?
I like the idea a great deal, provided that the music is at least CD quality and the video is HD (or at least when the source is).