At the interview at the Festival de Cine Independiente de Buenos Aires which I announced earlier, Tom Waits also sang two songs: Never hold back spring an Tom Traubert's blues.
I hope to bring you some pictures one of these days. In the meanwhile, you can take a look over at Flickr.com.
Last.fm has a discussion going about the organisation of the event (in Spanish). Look at the right hand bottom corner of the page and under the "reviews" tab.
(thanks to Diego and Dorene)