While I have quite a few CD's, most of my park audio is MP3.
Got to love those park audios! I am eagerly awaiting the iTunes release of the 1964 World Fair Set. My favorite ride has always been Carousel of Progress and I love the theme song in all versions
I agree with the others here. While I do have a lot of Disney CDs, most of my stuff is in mp3 form. I think my Disney collection on my iPod is close to 2800 tracks now.
I collect my Disney music on CD and iTunes/MP3s. I collect soundtracks, park audio, and especially variations of Disney music - classics re-interpreted in other genres (i.e. jazz, country, techno, bossanova, etc.....)
Albums(though I can't play them anymore), cd's and mp3!! The musical history of disneyland 6 cd-set is really good if you're into sounds from the park(released and unreleased).