Hello all.
I’m looking for input. I am about to start writing a web-based turn-based multiplayer business sim. You get to start your own software empire, and try to crush you opponents with underhanded business practices. My design outline can be found at http://www.nukesoft.org/stuff/vc.html . I intend to write the game using JSPs and Servlets. I am still on the fence about using EJB for the business logic. Please tell me what you think.
It’s a great idea. Direct access, no downloading or installation issues for gamers. I’m making a diablo like game (turn based) using the same technologies (servlet, jsp, EJB). I’ll help you when possible. You can contact me for technical questions or to share informations or resources. 
A last word : I apologize for my poor english. I’m french and not fluent in english. I read it better than I can write it. :-[
What kind of lessons have you learned in your project? Are the EJBs necessary?
As a general example of a successful business-style game you could take a look at the bbc’s celebdaq site, which is a virtual stockmarket where one can buy and sell shares in celebrities. It’s not very similar to what you are doing, but you may be able to pick up some useful ideas from it.
Wow, quite an ambitious project you’ve got outlined there. Sounds similar to SimCity or Civilization, but for a business.
Good luck.