The first no- Extreme cd one must buy if you want some really cool Nuno sounds is, Confessions by Dweezil Zappa in 1991. Nuno produced it and sang back-ups on practically every song, and sings lead vocals on a few. He plays cello on a few tracks, oh yeah, he plays guitar on a couple too.It's no longer in print, so shop around.
Nuno also Produced the album Shaved and Dangerous by Baby Animals, his wife, Suzi DeMarci's band. It's really good, if you're into the style.
Another album that is very good that features the Nunster is Robert Palmer's Honey It features Nuno on many tracks, you can look in the cover to see what tracks, or you can just listen.
Nuno also played guitar on Janet Jackson's album Design of a Decade. He is believed to have played the intro to Black Cat, and it is believed that she did the "did you say your prayers yet" voice after More than Words on Pornograffitti.