iTunes isn't very friendly towards albums with three or four long songs-- people can purchase your entire album for three or four bucks! It's a failed system based on quantity. If you split the same three songs up into twenty snippets, people can purchase each song for .99 (totaling $19.80) or download the entire album for $9.99. Suddenly the same piece of music seems like a bargain.
The problem with putting track IDs all over your songs is that many MP3 players have a noticeable glitch if there isn't a second or two of digital silence between tracks. Not to mention that a song is meant to be heard from the beginning, not the middle!
I'm keeping all this mind as I document my ideas. Some artifacts fit together nicely, others are meant to stand on their own. I wish I didn't have to write with iTunes in the back of my mind. But as a career musician that makes non-commercial music during an economic valley, I need to make decisions carefully if I want to persevere the storm.