I've been boycotting them since uni but I must admit that I failed dismally when it came to nappies because I have used Huggies.

For those who don't know the why here are a couple of links
Kleercut.Net | Kimberly-Clark and Kleenex are wiping away ancient forests
Are Kleenex tissues wiping out forests? - Sep. 27, 2006

They are more US based. KC has also used wood from old growth forests in Tasmania and Indonesia.