Clubbells will help develop the physical attributes you need to strike. Greater strength, speed, endurance, mobility, breath integration, balance, coordination, leg drive... you name it. Once you have developed a solid foundation of basic Clubbell skills, check out a manual called "Going Ballistic: CST for Boxing" which specificly addresses Clubbell training for striking as written by boxing coach Brandon Jones.
That said, you will also need to spend some quality time working your punching, preferably with a good coach and/or partner. For some great instruction in solo and partner drills, check out the "Fisticuffs" series from RMAX.
All of the above are available through my site. Let me know if you have any other questions.
PS - Clubbells have also done some amazing things for my weapons training. I can hold my own against stickfighting specialists of advanced rank though I haven't really focused on it for a long time. Compared to a CB, sticks feel like toys that are easily wielded.
(Message edited by JasonE on May 12, 2006)