This is the 25th year of the festival and organisers are expecting 15-16,000 people for the series of concerts to be held over the festival period. For more information go to this site
http://www.infomanif.com/magazine/lecture_article.php?act=AFF&varech=a9nqa0km
which is unfortunately in French.
If you like Jazz festivals and you're in France now you'll have to be quick as in late March is the
Jazz Grenoble festival, near Lyon
In July in Antibes and Nice there are also jazz festivals.
Check our
festivals page for more details of other upcoming events.