Ive had the good fortune of having been there before and i can tell you its FAB!
Lots of -cheap- airlines fly to Lisbon these days so its not too late yet in case u might wanna go.
Check out the website for more info : http://ftl.lusitango.com/
Or contact Augusto through the site, he is the festival organiser and a great person, always there to help you out.
Ate logo ! see you later because I will be there ;-)