For years Ubuntu has released a LiveCD (Desktop), LiveDVD (DVD), and text-mode installer (Alternate) for each release. For 12.10 (Quantal Quetzal), Ubuntu is getting rid of these three images and releasing a single, 800 MB Desktop DVD image.
While their download sites still list this as the Desktop CD, it’s too large to be burned normally, so they’ll have to update the name.
See the announcement on their Email List. Also, check out coverage on OMG! Ubuntu!