This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Servlet containers are allowed to place restrictions on applications. The 2.4 spec, section SRV 1.2 specifically mentions restricting Thread creation. Why not download the spec and read for yourself? This Sun site is a good start. Bill