The Ant build script creates various build artifacts under subdirectories in the "projects" directory, named build/dist. The key artifact you are probably interested in is in the projects/web-client/build/dist directory called "alfresco.war". This is the Alfresco web application containing the Alfresco core content management engine and the JSF web client, which I think Alfresco currently calls Alfresco Explorer. This WAR file is ready to deploy to your favorite app server.
You also can find the Share collaboration server project under projects/slingshot/build/dist as "share.war". The Surf web framework, upon which Share is built, is in projects/web-framework/build/dist as "alfwf.war".
Good luck.
-Tom