I’m looking for a green web host and I want to use ASP.NET. So far they all seem to only offer Linux/PHP (for cost reasons I assume). The only one I could find that offers ASP.NET support is Aiso which is /mo to even get DB access.
I looked at HostGator and the only place I could find Windows mentioned was for their dedicated servers (which start at 4/mo). 
Chosen Answer:
Well, without going all political on you, I’ve been using HostGator for 10 years, multiple sites, no downtime. They have windfarms and are totally green. Check it out. I was just checking to make certain you can get Windows and here’s what the site says:
What operating system comes with Windows?
All Windows Servers are provided with Windows Server 2008 Standard Edition R2. Windows Server 2003 Standard Edition is available upon request.
by: reluctantexan
on: 25th June 10
Posted in 
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The reason they offer Linux/PHP is that IIS is still a joke, and ASP isn’t much better. Real websites run on Apache/PHP/MySQL. The industry votes (against Microsoft) with its feet – you should too.
Well, without going all political on you, I’ve been using HostGator for 10 years, multiple sites, no downtime. They have windfarms and are totally green. Check it out. I was just checking to make certain you can get Windows and here’s what the site says:
What operating system comes with Windows?
All Windows Servers are provided with Windows Server 2008 Standard Edition R2. Windows Server 2003 Standard Edition is available upon request.
I am not 100% sure about any windows server plans but the best web hosting I have found is at tinyurl.com/cheaphosting123 my friend sent me the link adn I am switching to them from hostgator asap. I used to use justhost.com to but again i think they are too expensive and my friend is happy with ultrawebhosting so thats why i use it. (link is tinyurl because its a little longer than that and easier for me to remember)