Here is a link to the article. I thought it was really interesting. I don't know how old the article is. It may have been posted before but it's worth another read.
Seems the cammer is gaining in popularity and that's good because it will possibly create a bigger market. It might also lower the prices a wee bit.
http://www.allford.net.au/Paul%20Mun...20Magazine.htm
Hersh