Simon Merrick, a long-term contributor to this site and author of the Jamiroquai: Essential Bass Transcriptions book has recently completed a full bass transcription of Dynamite (in addition to the previous transcription of Seven Days In Sunny June), which is now available at the downloads section here at funkin.com or from Simon's own personal website.
In addition to this transcription, Simon is planning to release Volume II of his book in April/March of 2006. It is going to be a Stuart Zender edition featuring 4 tracks from each of the first 3 albums (12 tracks in total), and Stuart has agreed to write a foreword for the book after seeing the first book and being very impressed!
Finally, don't forget that the StuartZender.co.uk is still running "The Jamiroquai Bass Challenge", where there are a number of Jamiroquai "template" tracks for bassists to play along with. I don't play bass but love some of the tracks I've heard on the site, so why not give it a go.