[sdiy] Simple white noise generator?

[Paul Perry]

http://www.siliconchip.com.au/cms/A_103659/article.html
along the same lines, there's one halfway down the page here.
I havn't tried it myself.

What I would like to know, is if there is any possibility of just
having a high value resistor develop its own noise & amplify it up
usng modern low noise op amps? Am I missing something here?

paul perry melbourne australia