ant build for your blackberry

configure the eclipse for BB

http://www.blackberryforums.com/developer-forum/138210-setup-up-eclipse-blackberry-development.html

Blackberry ant tool
http://bb-ant-tools.sourceforge.net/docs

Apache ant here

http://gulus.usherbrooke.ca/pub/appl/apache/ant/binaries/apache-ant-1.7.1-bin.zip