I'm getting ready to go to Lisbon in 4 days !!! I found an interesting website about Lisbon: http://www.thelisbonconnection.com/
that has a fun video link about a neighborhood there called Mouraria. This neighborhood is near Alfama and looks like one of the older parts of Lisbon that has a connection to Fado, a type of music and singing that is very famous. Here is a video in Portuguese about the neighborhood. I wish I could understand what everyone is saying !
http://www.youtube.com/watch?v=SAG5NRoVizA

Enjoy !!!