This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Not really I guess. A component diagram is a structural diagram. Although with the number of use cases the complexity increases, so with more use cases your structure will also be more complex, which will most likely result in a bigger number of component diagrams.