Excellent, but I found it more useful to make the color for unread messages persistent rather than just for hover.
Henrique Abreu said about Gmail - Hide Invites on Oct 22 2008
Henrique Abreu said about Gmail - Add Row Highlights on Oct 22 2008
mod_wastrel said about Gmail - Add Row Highlights on Jun 13 2008
hug said about Gmail - Hide Invites on Feb 06 2008
hug said about Gmail - Add Row Highlights on Feb 06 2008
bugmenot123 said about Gmail - Add Row Highlights on Jan 10 2008