blogs? noob questions
 

im starting some blogs. should i put every blog on different hosts, or should i host them all under one host? whats best for se traffic?

and i see people talking about ip c-classes. whats that?

It sounds like you're getting ahead of your self a little bit. :-)

Why don't you start out by getting your blog up and running, trade some links, etc. and then worry about working with various hosts and class IPs? Start small.