Agree with previous post's request to support classpath on the 
schemaexport task.

I too have been trying for a while to get the schemaexport to run as 
part of the normal ant build.

I have separate source and build directory for compiled classes.  I 
also like to clean the build dir each time.  If I put the build path 
in the taskdef then Eclipse's external ant runner complains that the 
build path doesn't exist, since it is attempting to look up the 
taskdefs.

If there is a simple way of doing it I am not finding it intuitive.