Portal (Portlet) or AJAX ?

I am going to develop a web application but not sure what development framework is better.
Nowadays, there are many frameworks for developing web application. For examples: JSF, JSP/Servlet, Java Portal (Portlet) framework, Springframework, Struts, Webworks, and also AJAX, etc. Too many taht I can't list or really know about them.

My first choice is Portal(portlet) + Ajax. For using Java as the development language, which portal is better? I prefer JBoss Portal, the framework is more structure and easy to use. The Liferay Portal has many well developped portlets for use.

Anyway, both of them I give up but customized the Apache Pluto-2.0. It is in the development statge. I want to get more suggestions on a Java Portal Server. Let's say, functions, arcvhitectures, etc.

Facebook application

Recently, facebook games are very popular arround us. Almost all of my friends play and use facebbok. They like to share their friend and games.

I am also using facebbok and try to develop a simple application (game) in facebook.

The game is talking about how to be the most rich people in the town. If you have interest, just go to have a look.

AirCoon (娛樂大亨 - 金光大道傳奇)
http://apps.facebook.com/aircoon/

What can we do with Google Maps in Macau?

1. Find the nearest restaurant
2. Locate the buildings (very useful in real estate agents)
3. plan a trip
4. etc.