The Neverhood sure is one of the best games I ever played, it slipped my mind when doing the 'Favorite game' thread. The music is nearly as good as in Grim Fandango.
The other two games (Skullmonkeys, Boombots) by those guys aren't good (because they're no adventures but kick/hit/jump-thingies).
I guess we'll never see any sequel to the Neverhood - the guys tried to get their own company running but obviously failed in doing it ( http://www.monkeytropolis.com/ - you can still haxxor into the old site via this link: http://www.monkeytropolis.com/about.html ).
http://www.neverhood.co.uk/ is a good tribute to the game.