I see that multple pictures can be embedded in an MP3 file, this would be nice to embed cover, linernotes, backcover, or just random artwork for the song.
It appears that only one is displayed on playback. Is there anyway to have the other images display on playback, perhaps cycle through the images or display one at a particular time while playing?
It depends on what you are playing them back with, playback isnt provided by Jaikoz itself it will use your default Music Player: iTunes, Winamp, Foobar ecetera.
Found a blog that answered my question: (http://www.richardfarrar.com/embedding-album-art-in-mp3-files/) . The short answer is that although there are 21 different types of ID3v2 image tags, including one type called [color=red]“A bright coloured fish”[/color] 
most MP3 players only display one image per MP3.
hey thanks for the link. I liked seeing the summary of known image types.
The image types can be set in Jaikoz as well (for mp3s) , double click on the number next to am image in table view , and for any artwork the type can be selected from the combo.