I have a hosting account that offers 10 completely different ip's, some are located at various locations in the US, the others are in the UK and Asia. I want to use it primarily for SEO purposes for my small blog network. At the moment though they all have the same nameservers, Is it worth having separate private nameservers or is it enough that the IP's are completely different and spread around the world? Thanks in advance...
No need of separate name servers. you will be fine with seperate IP's. Infact I have seen many people running blog networks on same set of C class IP's successfully.