There is a lot wrong with GreenHosting.org's statements.
For example, they're claiming that the reasons their prices are so high is because it's expensive to use wind.
After watching a huge 4 hour special on this, the majority of the reasoning behind using wind powered electricity is because:
1. It's renewable.
2. It's very inexpensive
Right now, the consumption of petrolium is so high that they predict a peak, within our own generation. This of course means prices will soar, as it gets closer to peaking. For those that don't know, "peaking" means there will be no more. The earth is not magically going to create more oil for us. So we will be forced to make some kind of transition.
I think that GreenHosting is in this for all of the wrong reasons.
They seem to be taking advantage of people who know little about alternative energies, and using the "it's the cool thing, and the right thing" approach. "Yeah it's the right thing, but since it's also the cool thing, we're gonna charge you more."
Solar, Wind, and Magnetism are our most reliable renewable resources, and it costs very little to harness those particular energies. As for the reliability, the sun is basically a battery with a 5 million year life span (kinda puts the Energizer Bunny to shame lol), the wind will continue as long as the Earth rotates (if it stops, electricty will be the least of our worries), Magnetism is generated by the Earth itself and will be here as long as the Earth is.
Places like this need to realize that while they are helping, it will always be on a small degree until they stop taking advantage. You'll never get people to switch to alternative energies willingly, if you imply that it costs more, when the basis of it is to cost less in both dollars and resources.