There has been good work done on the documentation side since 1.5 release :
English
- a 32 pages tutorial to discover OpenJUMP, including a small section to
use OpenJUMP with PostGIS (updated by Stefan)
German
- a wonderful 87 page tutorial from Uwe, covering most functions of
OpenJUMP platform
- a very good PostGIS (1.5)/OpenJUMP (1.4) tutorial from uwe
French
- translation of the english tutoriel to discover OpenJUMP (Micha�l)
- reference documentation for OpenJUMP functions (Micha�l)
All these documents are downloadable at
http://sourceforge.net/projects/jump-pilot/files/Documentation/
And, of course, you have the wiki which is open to contributions
http://sourceforge.net/apps/mediawiki/jump-pilot/index.php?title=Index
Micha�l