This is the second beta of Jaikoz v2.4.0.
If you would like to try it out and give me any feedback that would be great, you can get the beta and more details about what it includes from http://www.jthink.net/jaikoz/jsp/beta/start.jsp
Jaikoz v2.4.0 beta 2 available released 11th April 2008
Hi Paul,
The new features listed for v2.4 look good 
The new Musicbrainz populated fields are a much appreciated addition; although, if possible, could you also please add the field ‘discnumber’
http://wiki.musicbrainz.org/DiscNumber
Currently, I have to look for all my multidisc releases and manually insert the disc numbers.
Thank you in advance.
[Edited to add: After browsing the Musicbrainz forum, it appears that the MB database may not include the Discnumber :? the alternative suggested is to move (disc X) from the releases title into separate tags (discnumber and discsubtitle). ]