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.
That is not a particularly useful generalization. IMHO you should think in terms of using servlets for computation intensive applications and JSP for supporting complicated HTML designs. If you are the only Java programmer in a shop that does a lot of HTML, custom taglibs in JSP make sense. Bill