Delerium is the cash cow of Bill Leeb and Rhys Fulbar. Delerium is very popular in Europe and Canadia, even appeared at the Canadian equivalent to the MTV music awards (kick me, I don't remember the correct name).

Early Delerium works bordered on Industrial/Experimental, with distorted vocals and grating percussion. The more recent works are more serene, very downtempoish. The album Semantic Spaces features Kristy Thirsk and is considered their best (aka most popular) to date.