All you want to know about Khoomei is probably here.
This article is a good explaination of khoomei. It contains various sounds, showing various khoomei techniques.
A nice course (in audio) by Brian Grover. It covers everything that is needed. Very good material.
Note from June, 20th, 2005: this group does not
seem to exist anymore, which is bad a thing.
In this group, all the khoomei fanatics used to discuss and share.
It was a great resource, with a lot of links.
Here are some saved messages
(2,285,609 bytes).
See the link below for a new group about the same topic.
This group replaces the Tuvan Throat Singing group. A lot of talented people here, sharing their love and knowledge of khoomei.
The official website of this very good band.
A website in french, for the french readers of you.