Why Hosting for SEO?
As a fellow SEO I recognize the importance of having your sites hosted in different Class C IP blocks especially if they are cross linked.
Google as well as other search engines are increasingly cracking down on SEO's and affiliate marketers with their recent filters and algo changes like "Florida" and "Hilltop" which if you take a look at the latter's patent takes into consideration the IP addresses of links to rank sites and the dreaded and much discussed "sandbox effect" where IP addresses can have a significant effect..
SEO and Affiliate Marketing are becoming increasingly competitive and crowed. As an SEO not only are you trying to stay one step ahead of the search engines but also ahead of your competitors and the top 10 keyword results get nearly all the traffic. Every advantage as little as it may seem can be the difference between being number 5 or 50 for a competitive keyword search.
If you want to sleep better at night and remove or at least decrease another variable in your optimization efforts I would suggest hosting your sites in different Class C IP's especially if you are an advanced SEO with multiple sites and are thinking of spreading some PR and "theme" between your sites.
It's very hard to find a host that provides more than 3 or 4 Class C IP's available. Most Web hosts consolidate their hosting in only a couple of powerful multi CPU servers and nearly all of them keep their servers in the same datacenter (physical location) for logistical and economic reasons therefore limiting greatly their broad IP pool.
As you see web hosts don't have the average SEO's needs in mind and I bet Google and other SE's know this. For example most hosts nowadays are braging about and offering vast quantities of space and bandwidth but the average affiliate site consisting of only a small number of pages targeting niche categories doesn't even use 1 percent of that but as I explained above having multiple broad IP's can be very useful to them.
Providing hosting with the average SEO's needs in mind poses logistical as well as economic challenges and that is why there aren't any at least to my knowledge that addresses this problem adequately.
Coming from a Web Hosting background as well as being an SEO for the past 3 years I recognize that especially with the recent developments in the SE's and the search engine wars in full swing battling for the most relevant search results that having access to different Class C IP's is a must have in an SEO's arsenal.
Agustin Castells
CEO and Founder
HostingforSEO.com