Gracenote CDDB vs. MusicBrainz vs. AMG Lasso

This is a comparison of using Gracenote CDDB vs. MusicBrainz vs. AMG Lasso in the context of a new media player application.

Free to use?

Gracenote - only for non-commercial use; commercial use requires a license fee which is not specified on their website
MusicBrainz - yes; open-source (GPL)
AMG Lasso - unclear from website but it looks like there would be licensing fees involved

Genre tags?

Gracenote - yes
MusicBrainz - no
AMG Lasso - ?

Problems catagorizing classical music tracks?

Gracenote - yes
MusicBrainz - yes
AMG Lasso - looks like more support than the others for classical music

Used in exisiting commercial applications?

Gracenote - yes, notably iTunes
MusicBrainz - no major commercial application yet
AMG Lasso - yes, notably Windows Media Player

Downloads album cover art?

Gracenote - no
MusicBrainz - ?
AMG Lasso - yes

Recognize DVDs?

Gracenote - ?
MusicBrainz - don't think so
AMG Lasso - yes

Detail/quality level of metadata?

Gracenote - user submitted
MusicBrainz - user submitted
AMG Lasso - connected with All Media Guide printed media (which has edited reviews of CD's and DVD's)