EFF has a list here.

EFF has confirmed the presence of XCP on the following titles (each has a data session, easily read on a Macintosh, that includes a file called “VERSION.DAT” that announces what version of XCP it is using). If you have one of these CDs, and you have a Windows PC (Macs are totally immune, as usual), you may have caught the XCP bug.

Trey Anastasio, Shine (Columbia)
Celine Dion, On ne Change Pas (Epic)
Neil Diamond, 12 Songs (Columbia)
Our Lady Peace, Healthy in Paranoid Times (Columbia)
Chris Botti, To Love Again (Columbia)
Van Zant, Get Right with the Man (Columbia)
Switchfoot, Nothing is Sound (Columbia)
The Coral, The Invisible Invasion (Columbia)
Acceptance, Phantoms (Columbia)
Susie Suh, Susie Suh (Epic)
Amerie, Touch (Columbia)
Life of Agony, Broken Valley (Epic)
Horace Silver Quintet, Silver’s Blue (Epic Legacy)
Gerry Mulligan, Jeru (Columbia Legacy)
Dexter Gordon, Manhattan Symphonie (Columbia Legacy)
The Bad Plus, Suspicious Activity (Columbia)
The Dead 60s, The Dead 60s (Epic)
Dion, The Essential Dion (Columbia Legacy)
Natasha Bedingfield, Unwritten (Epic)
Ricky Martin, Life (Columbia) (labeled as XCP, but, oddly, our disc had no protection)

There are two other lists, here and here.

Alex Eckelberry
(Thanks Jarrett)