Maybe it's the recent Live Earth coverage, but the rain forest site (
http://www.therainforestsite.com/) would not load for me this morning. I had the same problem with the hunger site (
http://www.thehungersite.com/). I wonder if it's because of all the attention the environment and the problems it is causing with famine are getting in the news.
The breast cancer, child health, animal rescue, and literacy sites loaded ok. Of course, these are the lesser known sites and may never have been as popular.
I've put all of the click-a-day-for charity sites in one bookmark group in Firefox. Every day when I use my home computer it only usually takes 10 seconds to open all in tabs and click on and donate a few square feet of rain forest, part of a bowl of animal food, etc. The donation is paid for by the sponsors. All I invest is 10 seconds of my time assuming I'm on the computer anyway.
If the hunger and rain forest sites are down because of volume, that's both a good and bad thing.
P.S. The hunger site finally came back. The rain forest site is still unavailable.