http://www.musicplasma.com/

thx to Mil for the link

http://www.sierra.com/news_story.do?storyId=256
Trailer:
http://www.sierra.com/file_list.do?gamePlatformId=607

Play these 4 games at once :-)
http://www.shockwave.com/bin/content/shockwave.jsp?id=arcadia