Here are some links which can help you started with application development for BB

Official Blackberry Page - http://na.blackberry.com/eng/developers/javaappdev/
Learning Resources - http://na.blackberry.com/eng/develop...ningresources/
Development Tools and Downloads - http://na.blackberry.com/eng/develop...v/devtools.jsp
Smartphone Simulators - http://na.blackberry.com/eng/develop...simulators.jsp

Tutorials - http://na.blackberry.com/eng/develop...ab_development
Videos - http://na.blackberry.com/eng/develop...ail_subtab_jde