I'm in need of a few new media types, and I figured I'd run them by y'all.

CDV (CD Video) (https://en.wikipedia.org/wiki/CD_Video)
The predecessor of the VCD: a CD/Laserdisc hybrid. Primarily used for music videos.
Example release: http://musicbrainz.org/release/e4c05d17-c372-4031-8861-73b36387102a

Hybrid SACD
A Super Audio CD with both a SACD layer and a standard CD layer so it can be played back on a normal CD player.
Example release: http://musicbrainz.org/release/48609c7c-0a10-4ec5-a832-c09de292a0dc

Blu-spec CD (https://en.wikipedia.org/wiki/Blu-spec_CD)
A CD manufactured using the Blu-ray Disc manufacturing process.
Example release: http://musicbrainz.org/release/bcd3a7fe-19ab-435e-9082-78d558ca810c

CD+G (https://en.wikipedia.org/wiki/CD%2BG)
A CD with some of the normally unused channels loaded with graphics that can be played back on a compatible device. Often used for karaoke.
Example release: http://musicbrainz.org/release/ee40bbf9-08a5-4a50-9a8f-63c4828488f4 (technically an 8cm CD+G)
A better list of releases: http://www.cdplusg.com/cdplusg/Discography/Discography.html

SHM-CD (Super High Material CD)
A CD manufactured using a special polycarbonate that allows for better reading by CD players.
Example release: http://musicbrainz.org/release/b197bbcd-8795-4693-b8a3-70261a0bae9c

HQCD (High Quality CD)
A CD with the same proprietary polycarbonate as an SHM-CD but with a special alloy used for the medium (instead of aluminum).
Example release: http://musicbrainz.org/release/c740162c-5f41-4dcb-8265-cf2afb4de996